bluuebunny/crossref_metadata_2025 huggingface dataset:
CUIDANDO DE QUEM CUIDA: EDUCAÇÃO EM SAÚDE COM AS PRÁTICAS INTEGRATIVAS E COMPLEMENTARES NO CUIDADO COM O TRABALHADOR DA SAÚDE
Authors: Santos Maria Aparecida , Figueiro Ana Claudia
Published: April 2019

O Global Forum for Health Research (2002), estipulou uma agenda de prioridades de pesquisa em saúde, que dentre outras coisas, visa superar a distância entre a produção, translação e usos do conhecimento cientifico em prol da população. O Brasil vem utilizando formatos de trabalhos de pesquisas cientificas em rede, visando a aproximação e a interagência entre ciência, comunidade e todos os atores envolvidos. Este artigo mostra uma experiência de translação do conhecimento no Centro de Saúde  Escola Germano Sinval Farias, em Manguinhos, Rio de Janeiro,  mediada pelo uso das Práticas  Integrativas  e Complementares  em atendimentos de portas abertas, oficinas de educação em saúde para Agentes Comunitários e Saúde  para o cuidado de si e dos seus. Desta maneira tornou possível extrapolar o aprendizado para a comunidade. Utiliza a metodologia qualitativa, em uma triangulação com a Translação do Conhecimento, Teoria  do Ator Rede e Educação em Saúde. Seus resultados apontam para ampliação da reflexividade sobre saúde e melhor consciência de  viver saúde com corpos sensíveis e mais criativos.Palavras-chave: Praticas  Integrativas e Complementares; Educacao  em Saude; Translação  do Conhecimento; Teoria  do Ator  Rede.
O PROBLEMA METODOLÓGICO E POLITICO DE RECOLHER EVIDÊNCIAS EMPÍRICAS EM REGIÕES ARRISCADAS DA REALIDADE AMAZÔNICA: PROBLEMATIZAÇÕES PARA A EDUCAÇÃO POPULAR EM SAÚDE
Authors: Hélène Laperrière
Published: April 2019

O artigo reflete sobre o desaparecimento de evidências como ameaças, riscos ou violênciasnas praticas de promoção da saúde para convergir ao discurso social desejável na planificação e gestão em saúde. As agências internacionais projetam um mundo onde as subversões são ausentes. Poucos estudos se atreviam em discutir a censura de situações de ameaça de vida ao nível local em realizar as ações planejadas. Uma autoetnografia relata as experiências na região amazônica como moradora e enfermeira nos programas de controle da Hanseníase e da AIDS nos anos 90. Os resultados esquematizam o confronto entre o discurso consensual das agências internacionais, a gestão de programa em saúde e as observações de quem faz o trabalho.
Amenability-like properties of C(X,A)
Authors: Ghoraishi S. , Mahmoodi A. , Medghalchi A.R.
Published: April 2019

Let A be a Banach algebra and X be a compact Hausdorff space. For given
homomorphisms ? ? Hom(A) and ? ? Hom(C(X,A)), we introduce homomorphisms ??
? Hom(C(X,A)) and ??x ? Hom(A), where x ? X. We then study both ??-(weak)
amenability of C(X,A), and ?x-(weak) amenability of A.
Cloud service reliability assessment approach based on multi-valued neutrosophic cross-entropy and entropy measures
Authors: Wang Yi , Wang Xiao-Kang , Wang Jian-Qiang
Published: April 2019

Cloud service reliability assessment is a vital decision-making activity for
companies and individuals. In this assessment, the evaluation information
can be represented by multi-valued neutrosophic numbers (MVNNs). MVNNs are
regarded as an integration of single-valued neutrosophic numbers (SVNNs) and
hesitant fuzzy numbers (HFNs); therefore, considering the defects of entropy
and crossentropy measures for SVNNs and HFNs, we first define a framework of
entropy measures and a family of cross-entropy measures for MVNNs in this
paper. Second, a novel extended VIKOR (VlseKriterijumska Optimizacija I
Kompromisno Resenje) method based on entropy and cross-entropy measures is
developed to address the decision-making problems when information about
criteria weights is absolutely unknown. Finally, we apply the proposed
method to evaluate cloud service reliability; also, a sensitivity analysis
and a comparative analysis are made to interpret the practicality and
effectiveness of it. The results of analyses verify that the proposed method
based on cross-entropy is much better than the methods using general
distance measures.
Two dimensional operator preinvex functions and associated Hermite-Hadamard type inequalities
Authors: Mihai Marcela , Awan Muhammad , Noor Muhammad , Du Ting-Song , Khan Awais
Published: April 2019

We first introduce the notion of operator (h1, h2)-preinvex on the
co-ordinates. After this some new two dimensional version of integral
inequalities of Hermite-Hadamard type associated with this new class of
operator (h1, h2)-preinvex are obtained. Some new and novel particular cases
are also discussed.
Extended partial b-metric spaces and some fixed point results
Authors: Parvaneh V. , Kadelburg Z.
Published: April 2019

In this paper, we introduce the concept of extended partial b-metric space.
We demonstrate a fundamental lemma for the convergence of sequences in such
spaces. Then we prove some fixed point results for weakly contractive
mappings in the setup of ordered extended partial b-metric spaces. An
example is given to verify the effectiveness and applicability of our main
results. An application of these results to Volterra-type integral equations
is provided at the end.
Singular value inequalities for Hilbert space operators
Authors: Taleb Alfakhr , Omidvar Mohsen
Published: April 2019

In this paper we show that if Ai,Bi,Xi are Hilbert space operators such that
Xi is compact i = 1,2,..., n and f,g are non-negative continuous
functions on [0,?) with f (t)g(t)=t for all t?[0,?), also h is
non-negative increasing operator convex function on [0,?), then h(Sj(?n,i=1 ?iAi*Xi*Bi)) ? Sj(?n,i=1 ?ih(Ai* f(|Xi*|)2Ai) ? ?n,i=1 ?ih(Bi* g(|Xi|)2Bi)) for j = 1,2,... and ?n,i=1 ?i = 1. Also, applications of some inequalities are given.
On the reciprocal sums of products of Fibonacci and Lucas numbers
Authors: Choi Ginkyu , Choo Younseok
Published: April 2019

In this paper, we study the reciprocal sums of products of Fibonacci and
Lucas numbers. Some identities are obtained related to the numbers ??,k=n
1/FkLk+m and ??,k=n 1/LkFk+m, m ? 0.
A new aspect of rectifying curves and ruled surfaces in Galilean 3-space
Authors: Demir Çetin , Gök İsmail , Yayli Yusuf
Published: April 2019

A curve is named as rectifying curve if its position vector always lies in
its rectifying plane. There are lots of papers about rectifying curves in
Euclidean and Minkowski spaces. In this paper, we give some relations
between extended rectifying curves and their modified Darboux vector fields
in Galilean 3-Space. The other aim of the paper is to introduce the ruled
surfaces whose base curve is rectifying curve. Further, we prove that the
parameter curve of the surface is a geodesic.
On geometry of the midlocus associated to a smooth curve in plane and space
Authors: Alghanemi Azeb , Giblin Peter
Published: April 2019

The singularities of the midpoint map associated to a smooth plane curve,
which is a map from the plane to the plane, are classified. The midlocus
associated to a regular space curve is introduced. The geometric conditions
for the midlocus of a space curve to have a crosscap or an S?1
singularities are investigated. A more general map, the ?-point map,
associated to a space curve is introduced and many known surface
singularities are realized as a special cases of this construction.
*-DMP elements in *-semigroups and *-rings
Authors: Gao Yuefeng , Chen Jianlong , Ke Yuanyuan
Published: April 2019

In this paper, we investigate *-DMP elements in *-semigroups and *-rings. The
notion of *-DMP element was introduced by Patr?cio and Puystjens in 2004.
An element a is *-DMP if there exists a positive integer m such that am is
EP. We first characterize *-DMP elements in terms of the {1,3}-inverse,
Drazin inverse and pseudo core inverse, respectively. Then, we characterize
the core-EP decomposition utilizing the pseudo core inverse, which extends
the core-EP decomposition introduced by Wang for complex matrices to an
arbitrary *-ring; and this decomposition turns to be a useful tool to
characterize *-DMP elements. Further, we extend Wang?s core-EP order from
complex matrices to *-rings and use it to investigate *-DMP elements.
Finally, we give necessary and sufficient conditions for two elements a,b in
*-rings to have aaD = bbD, which contribute to study *-DMP elements.
Concavity in fractional calculus
Authors: Eloe Paul , Neugebauer Jeffrey
Published: April 2019

We discuss a concavity like property for functions u satisfying D?0+u ? C[0,
b] with u(0) = 0 and -D?0+u(t) ? 0 for all t ? [0,b]. We develop the
property for ? ? (1,2], where D?0+ is the standard Riemann-Liouville
fractional derivative. We observe the property is also valid in the case ? =
1. Finally, we show that under certain conditions, -D?0+u(t) ? 0 implies u
is concave in the classical sense.
Coefficient estimates for some subclasses of m-fold symmetric bi-univalent functions
Authors: Srivastava H.M. , Zireh Ahmad , Hajiparvaneh Saideh
Published: April 2019

In this work, we introduce and investigate a subclass Hh,p ?m(?,?) of
analytic and bi-univalent functions when both f(z) and f-1(z) are m-fold
symmetric in the open unit disk U. Moreover, we find upper bounds for the
initial coefficients |am+1| and |a2m+1| for functions belonging to this
subclass Hh,p ?m(?,?). The results presented in this paper would generalize
and improve those that were given in several recent works.
Delayed over-relaxation in iterative schemes to solve rank deficient linear system of (matrix) equations
Authors: Ameri Arezo , Beik Fatemeh
Published: April 2019

Recently in [Journal of Computational Physics, 321 (2016), 829-907], an
approach has been developed for solving linear system of equations with
nonsingular coefficient matrix. The method is derived by using a delayed
over-relaxation step (DORS) in a generic (convergent) basic stationary
iterative method. In this paper, we first prove semi-convergence of
iterative methods with DORS to solve singular linear system of equations. In
particular, we propose applying the DORS in the Modified HSS (MHSS) to solve
singular complex symmetric systems and in the Richardson method to solve
normal equations. Moreover, based on the obtained results, an algorithm is
developed for solving coupled matrix equations. It is seen that the proposed
method outperforms the relaxed gradient-based (RGB) method [Comput. Math.
Appl. 74 (2017), no. 3, 597-604] for solving coupled matrix equations.
Numerical results are examined to illustrate the validity of the established
results and applicability of the presented algorithms.
Fekete-Szegö inequality for analytic and bi-univalent functions subordinate to Chebyshev polynomials
Authors: Yousef Feras , Frasin B.A. , Al-Hawary Tariq
Published: April 2019

In the present study, anewsubclass of analytic and bi-univalent functions by
means of Chebyshev polynomials is introduced. Certain coefficient bounds for
functions belong to this subclass are obtained. Furthermore, the
Fekete-Szeg? problem in this subclass is solved.
The range of block Hankel operators
Authors: Hwang In , Kim In , Kim Sumin
Published: April 2019

In this note we give a connection between the closure of the range of block
Hankel operators acting on the vector-valued Hardy space H2Cn and the left
coprime factorization of its symbol. Given a subset F ? H2Cn, we also
consider the smallest invariant subspace S*F of the backward shift S* that
contains F.
Uniquely shift-transitive graphs of valency 5
Authors: Iranmanesh Mohammad , Sharifi SH.
Published: April 2019

An automorphism ? of a finite simple graph ? is a shift, if for every vertex
v ? V(?),?v is adjacent to v in ?. The graph ? is shift-transitive, if
for every pair of vertices u,v ? V(?) there exists a sequence of shifts
?1, ?2,...,?k 2 Aut(?) such that ?1?2...?ku = v. If, in addition, for
every pair of adjacent vertices u,v ? V(?) there exists exactly one shift
? ? Aut(?) sending u to v, then ? is uniquely shift-transitive. The
purpose of this paper is to prove that, if ? is a uniquely shift-transitive
graph of valency 5 and S? is the set of shifts of ? then ?S??, the
subgroup generated by S? is an Abelian regular subgroup of Aut(?).
Stability results for Suzuki contractions with an application to initial value problems
Authors: Pant Rajendra , Mishra S.N.
Published: April 2019

Stability of fixed points for a wider class of mappings is studied in a
metric space. The results obtained herein include a number of known results.
An application to initial value problems is also discussed.
New characterizations for the integral-type operator from BMOA to Bloch-type spaces
Authors: Chen Cui , Liang Yu-Xia
Published: April 2019

Our aim in this paper is to consider some new characterizations for the
boundedness of the integral-type operator TgC? acting from BMOA(VMOA) into
Bloch-type spaces and give a brief expression for its essential norm.
Concomitants of order statistics and record values from Bairamov-Kotz-Becki-FGM bivariate-generalized exponential distribution
Authors: Barakat H.M. , Nigm E.M. , Syam A.H.
Published: April 2019

We introduce the Bairamov-Kotz-Becki-Farlie-Gumble-Morgenstern (BKB-FGM) type
bivariategeneralized exponential distribution. Some distributional
properties of concomitants of order statistics as well as record values for
this family are studied. Recurrence relations between the moments of
concomitants are obtained, some of these recurrence relations were not
publishes before for Morgenstern type bivariate distributions. Moreover,
most of the paper results are extended to arbitrary distributions (see
Remark 3.1).
A new approach to gradient Ricci solitons and generalizations
Authors: Crasmareanu Mircea
Published: April 2019

This short note concerns firstly with two inequalities in the geometry of
gradient Ricci solitons (g,f,?) on a smooth manifold M. These inequalities
provide some relationships between the curvature of the Riemannian metric g
and the behavior of the scalar field f through two second order equations
satisfied by the scalar ?. Secondly, we propose several generalizations of
Ricci solitons to the setting of manifolds endowed with linear connections,
not necessary of metric type. Thirdly, we express the usual Ricci solitons
equation in terms of two Golab connections.
A compactification of an orbit space
Authors: Karapınar Dünya
Published: April 2019

Let X be a Tychonoff G-space, G be a finite discrete group and A be a dense
and invariant subspace of X. In this paper, by means of Gelfand?s method, we
construct a compactification of the orbit space A/G. As an application, we
show that the set of maximal ideals of even function ring with Stone
topology is a compactification of non-negative rationals.
Computation of k-ary Lyndon words using generating functions and their differential equations
Authors: Kucukoglu Irem , Simsek Yilmaz
Published: April 2019

By using generating functions technique, we investigate some properties of
the k-ary Lyndon words. We give an explicit formula for the generating
functions including not only combinatorial sums, but also hypergeometric
function. We also derive higher-order differential equations and some
formulas related to the k-ary Lyndon words. By applying these equations and
formulas, we also derive some novel identities including the Stirling
numbers of the second kind, the Apostol-Bernoulli numbers and combinatorial
sums. Moreover, in order to compute numerical values of the higher-order
derivative for the generating functions enumerating k-ary Lyndon words with
prime number length, we construct an efficient algorithm. By applying this
algorithm, we give some numerical values for these derivative equations for
selected different prime numbers.
Separation axioms in supra soft bitopological spaces
Authors: Gunduz Aras , Bayramov Sadi
Published: April 2019

In 1999, Russian researcher Molodtsov proposed the new concept of a soft set
which can be considered as a new mathematical approach for vagueness.
Topological structures of soft set have been studied by some authors in
recent years. In this paper we define separation axioms in supra soft
bitopological space using only soft point in [2] and investigate some of
their important characterizations.
Some perturbation results for ascent and descent via measure of non-compactness
Authors: Chafai Ezzeddine , Boumazgour Mohamed
Published: April 2019

The aim of this paper is to enlarge some known results from Fredholm and
perturbation theory via measure of non-compactness. As applications, we
focus on the study of the essential ascent and the essential descent spectra
of an operator T defined on a given Banach space. Some perturbation results
are also investigated.
Pointwise planar horizontal sections along Riemannian submersions
Authors: Bozdag Şerife , Şahin Bayram
Published: April 2019

We study Riemannian submersions with pointwise k-planar horizontal sections.
We provide examples, obtain characterizations and give a geometric
interpretation of such property.
Effects on rough I-lacunary statistical convergence to induce the weighted sequence
Authors: Ghosal Sanjoy , Banerjee Mandobi
Published: April 2019

Two classes of sets are introduced: rough weighted I-lacunary statistical
limit set and weighted I-lacunary statistical cluster points set which are
natural generalizations of rough I-limit set and I-cluster points set
respectively. To highlight the variation from basic results we place into
some new examples. So our aim is to analyze the different behaviors of the
new convergences and characterize both the sets with topological approach
like closedness, boundedness, compactness etc.
Some remarks on fuzzy k-pseudometric spaces
Authors: Sostak Alexander
Published: April 2019

An important class of spaces was introduced by I.A. Bakhtin (under the name
?metric-type?) and independently rediscovered by S. Czerwik (under the name
?b-metric?). Metric-type spaces generalize ?classic? metric spaces by
replacing the triangularity axiom with a more general axiom d(x,z)? k?
(d(x,y)+ d(y,z)) for all x,y,z ? X where k ? 1 is a fixed constant.
Recently R. Saadadi has introduced the fuzzy version of ?metric-type?
spaces. In this paper we consider topological and sequential properties of
such spaces, illustrate them by several examples and prove a certain version
of the Baire Category Theorem.
More results on extremum Randic indices of (molecular) trees
Authors: Husin Nor , Hasni Roslan , Du Zhibin , Ali Akbar
Published: April 2019

The Randic index R(G) of a graph G is the sum of the weights (dudv)-1/2 of
all edges uv in G, where du denotes the degree of vertex u. Du and Zhou [On
Randic indices of trees, unicyclic graphs, and bicyclic graphs, Int. J.
Quantum Chem. 111 (2011), 2760-2770] determined the n-vertex trees with the
third for n ? 7, the fourth for n ? 10, the fifth and the sixth for n ? 11
maximum Randic indices. Recently, Li et al. [The Randic indices of trees,
unicyclic graphs and bicyclic graphs, Ars Comb. 127 (2016), 409-419]
obtained the n-vertex trees with the seventh, the eighth, the ninth and the
tenth for n ? 11 maximum Randic indices. In this paper, we correct the
ordering for the Randic indices of trees obtained by Li et al., and
characterize the trees with from the seventh to the sixteenth maximum
Randic indices. The obtained extremal trees are molecular and thereby the
obtained ordering also holds for molecular trees.
Well-posedness and exponential stability for coupled Lamé system with a viscoelastic damping
Authors: Taouaf Noureddine , Amroun Noureddine , Benaissa Abbes , Beniani Abderrahmane
Published: April 2019

In this paper, we consider a coupled Lam? system with a viscoelastic
damping in the first equation. We prove well-posedness by using
Faedo-Galerkin method and establish an exponential decay result by
introducing a suitable Lyaponov functional.
On the determinants and inverses of R-circulant matrices with the biperiodic Fibonacci and Lucas numbers
Authors: Köme Cahit , Yazlik Yasin
Published: April 2019

In this paper, we present a new generalization to compute determinants and
inverses of r-circulant matrices Qn = circr ((b/a)?(2)/2 q1,(b/a)?(3)/2
q2,..., (b/a)?(n+1)/2 qn) and Ln = circr ((b/a)?(1)/2 l1,(b/a)?(2)/2 l2,..., (b/a)?(n)/2 ln) whose entries are the biperiodic
Fibonacci and the biperiodic Lucas numbers, respectively. Also, we express
determinants of the matrices Qn and Ln by using only the biperiodic
Fibonacci and the biperiodic Lucas numbers.
Legendre curves on 3-dimensional Kenmotsu manifolds admitting semisymmetric metric connection
Authors: Tang Wanxiao , Majhi Pradip , Zhao Peibiao , De Uday
Published: April 2019

The object of the present paper is to study biharmonic Legendre curves,
locally ?-symmetric Legendre curves and slant curves in 3-dimensional
Kenmotsu manifolds admitting semisymmetric metric connection. Finally, we
construct an example of a Legendre curve in a 3-dimensional Kenmotsu
manifold.
An application of quasi-monotone sequences to absolute matrix summability
Authors: Yıldız Şebnem
Published: April 2019

Recently, Bor [5] has obtained two main theorems dealing with |?N,pn|k
summability factors of infinite series and Fourier series. In the present
paper, we have generalized these theorems for |A,?n|k summability method by
using quasi-monotone sequences.
On non-linear contractions via extended CF-simulation functions
Authors: Chanda Ankush , Ansari Arslan , Dey Lakshmi , Damjanovic Bosko
Published: April 2019

On grounds of the notion of simulation functions, in this manuscript, we
bring in the concept of an extended CF-simulation function and conceive a
few common fixed point results via such kind of contractions on complete
metric spaces. These class of auxiliary functions generalize, improve and
extend those of simulation functions, extended simulation functions and
CF-simulation functions. However, as applications of the aforesaid results,
we figure out some related consequences of it on the said spaces. Our
findings are authenticated by the aid of some competent, non-trivial and
constructive examples.
Basic properties of finite sum of weighted composition operators
Authors: Alishahi Abolghasem , Shamsigamchi Saeedeh , Ebadian Ali
Published: April 2019

In this paper,we continue the study of finite sum of weighted composition
operators between different Lp-spaces that was investigated by Jabbarzadeh
and Estaremi in 2012. Indeed, we first obtain some necessary and sufficient
conditions for boundedness of the finite sums of weighted composition
operators between distinct Lp-spaces. In the sequel, we investigate the
compactness of finite sum of weighted composition operators. By using
theorems of boundedness and compactness, we estimate the essential norms of
these operators. Finally, some examples to illustrate the main results are
given.
Categorical properties of L-fuzzifying convergence spaces
Authors: Pang Bin
Published: April 2019

In this paper, categorical properties of L-fuzzifying convergence spaces are
investigated. It is shown that (1) the category L-FYC of L-fuzzifying
convergence spaces is a strong topological universe; (2) the category L-FYKC
of L-fuzzifying Kent convergence spaces, as a bireflective and
bicoreflective subcategory of L-FYC, is also a strong topological universe;
(3) the category L-FYLC of L-fuzzifying limit spaces, as a bireflective
subcategory of L-FYKC, is a topological universe.
On some deddens subspaces of Banach algebras
Authors: Garayev Mubariz , Gürdal Mehmet , Tilki Havva
Published: April 2019

Let A be a Banach algebra with a unit e, and let a ? A be an invertible
element. We define the following algebra: Bloca := n {x ? A :??anxa-n?? ?
cxn?(x) for some ?(x) ? 0 and cx > 0}. In this articlewestudy some
properties of this algebra; in particular, weprove that Bloce+p = {x ? A :
px (e-p) = 0}, where p is an idempotent in A. We also investigate
the following Deddens subspace. Let a,b ? A be two elements. Fix any number
?,0 ? ? < 1, and consider the following subspace of A : D? a,b := {x ? A :
??anxbn?? = O(n?) as n ? ?}. Here we study some properties of the subspaces
D?a,b and D?b,a.
From Hom(A,X)  Hom(B,X) to A  B
Authors: Momtahan Ehsan , Amini Afshin , Amini Babak
Published: April 2019

Let A and B be two R-modules. We examine conditions under which Hom(A,X) ?
Hom(B,X), implies that A ? B, where X belongs to an appropriate class of
R-modules. Different perspectives of the question are studied. In the case of
abelian groups (Z-modules), this investigation gives a partial answer to an
old problem of L. Fuchs.
Jordan derivations of generalized one point extensions
Authors: Li Yanbo , Wei Feng
Published: April 2019

For a generalized one-point extension algebra, it is proved that under
certain conditions, each Jordan derivation is the sum of a derivation and an
anti-derivation. Moreover, we prove that every Jordan derivation of a dual
extension algebra is a derivation.
On extensions of singular fourth order dynamic operators on time scales
Authors: Tuna Hüseyin , Bayrak Songül
Published: April 2019

In this work, we consider a singular fourth order dynamic operator on time
scales. We construct a space of boundary values. Later, we give a
description of all maximal dissipative, self-adjoint and other extensions of
singular fourth order differential operators on unbounded time scales.
Some smoothness properties of the Lupaş-Kantorovich type operators based on Pólya distribution
Authors: Kajla Arun , Miclăuş Dan
Published: April 2019

In the present article, we study some smoothness properties of new
Lupa?-Kantorovich type operators based on P?lya distribution, as uniform
convergence and asymptotic behavior. In order to get the degree of
approximation, some quantitative type theorems will be established. The
bivariate extension of these operators, with some indispensable results will
be also presented.
Some formulas for Bell numbers
Authors: Komatsu Takao , Pita-Ruiz Claudio
Published: April 2019

We give elementary proofs of three formulas involving Bell numbers, including
a generalization of the Gould-Quaintance formula and a generalization of
Spivey?s formula. We find variants for two of our formulas which involve
some well-known sequences, among them the Fibonacci, Bernoulli and Euler
numbers.
Einstein statistical warped product manifolds
Authors: Aytimur Hülya , Özgur Cihan
Published: April 2019

We consider Einstein statistical warped product manifolds I x f N, M x f N and
M x f I; where I, M and N are 1, m and n dimensional statistical manifolds,
respectively.
Non-archimedean closed graph theorems
Authors: Leiger Toivo
Published: April 2019

We consider linear maps T: X ? Y, where X and Y are polar local convex spaces
over a complete non-archimedean field K. Recall that X is called polarly
barrelled, if each weakly* bounded subset in the dual X0 is equicontinuous.
If in this definition weakly* bounded subset is replaced by weakly* bounded
sequence or sequence weakly* converging to zero, then X is said to be
l?-barrelled or c0-barrelled, respectively. For each of these classes of
locally convex spaces (as well as the class of spaces with weakly* sequentially complete dual) as domain class, the maximum class of range
spaces for a closed graph theorem to hold is characterized. As consequences
of these results, we obtain non-archimedean versions of some classical
closed graph theorems. The final section deals with the necessity of the
above-named barrelledness-like properties in closed graph theorems. Among
others, counterparts of the classical theorems of Mahowald and Kalton are
proved.
Tauberian theorems for Cesàro summability of nth sequences
Authors: Parida P. , Paikray S.K. , Dutta Hemen , Jena B.B. , Dash M.
Published: April 2019

Tauberian theorem provides a criterion for the convergence of non convergent
(summable) sequences. In this paper, we established a Tauberian theorem for
nth real sequences via Ces?ro summability by using de la Vall?e Poussin
mean and slow oscillation. The discussion and findings are capable to unify
several useful concepts in the literature, and should also provide
nontrivial extension of several results. Some examples are incorporated in
support of our definitions and results. The findings are further expected to
be helpful in designing and study several other interesting problems in
summability theory and applications.
Application of Chebyshev polynomials to certain subclass of Non-Bazilevic functions
Authors: Juma Abdul , Abdulhussain Mushtaq , Al-Khafaji Saba
Published: April 2019

In this paper, we introduce a new certain subclass N(?,?,t) of
Non-Bazilevic analytic functions of type (1-?) by using the Chebyshev
polynomials expansions. We investigated some basic useful characteristics
for this class, also we obtain coefficient bounds and Fekete-Szeg?
inequalities for functions belong to this class. This class is considered a
general case for some of the previously studied classes. Further we discuss
its consequences.
Semihypergroups obtained by merging of 0-semigroups with groups
Authors: de Salvo , Fasino Dario , Freni Domenico , Lo Faro
Published: April 2019

We consider the class of 0-semigroups (H,*) that are obtained by adding a
zero element to a group (G,?) so that for all x,y ? G it holds x * y ? 0 =>
x * y = xy. These semigroups are called 0-extensions of (G,?). We introduce
a merging operation that constructs a 0-semihypergroup from a 0-extension of
(G,?) by a suitable superposition of the product tables. We characterize a
class of 0-simple semihypergroups that are merging of a 0-extension of an
elementary Abelian 2-group. Moreover, we prove that in the finite case all
such 0-semihypergroups can be obtained from a special construction where
(H,*) is nilpotent.
Gradient Ricci solitons on multiply warped product manifolds
Authors: Karaca Fatma , Özgür Cıhan
Published: April 2019

We consider gradient Ricci solitons on multiply warped product manifolds. We
find the necessary and sufficient conditions for multiply warped product
manifolds to be gradient Ricci solitons.
Approximation by Stancu-Durrmeyer type operators based on Pólya-Eggenberger distribution
Authors: Kajla Arun , Miclăuş Dan
Published: April 2019

In the present paper we introduce the Durrmeyer type modification of Stancu
operators based on P?lya-Eggenberger distribution. For these new operators
some indispensable auxiliary results are established in the second section.
Our further study focuses on a Voronovskaja type asymptotic formula and some
estimates of the rate of approximation involving modulus of smoothness,
respectively Ditzian-Totik modulus of smoothness. The rate of convergence
for differential functions whose derivatives are of bounded variation is also
obtained.
A note on clean elements and inverses along an element
Authors: Zhu Huihui , Patrício Pedro
Published: April 2019

Let R be an associative ring with unity 1 and let a,d ? R. An element a ? R
is called invertible along d if there exists unique a??d such that a??dad = d
= daa??d and a??d ? dR ? Rd (see [6, Definition 4]). In this note, we present
new characterizations for the existence of akd by clean decompositions of ad
and da. As applications, existence criteria for the Drazin inverse and the
group inverse are given.
On endomorphisms of crossed products
Authors: Chen Quan-Guo
Published: April 2019

In this paper, we will study the endomorphisms of a certain crossed product.
Improving some operator inequalities for positive linear maps
Authors: Yang Chaojun , Lu Fangyan
Published: April 2019

Let 0 < mI ? A ? m'I ? M'I ? B ? MI and p ? 1. Then for every positive unital
linear map ?, ?2p(A?tB)?(K(h,2)/41p-1(1+Q(t)(log M'm')2)
2p?2p(A#tB) and ?2p(A?tB)?(K(h,2)/41p-1(1+Q(t)(logM'm')2)
2p(?(A)#t ?(B))2p, where t ? [0,1], h = M/m, K(h,2) = (h+1)2/4h, Q(t) =
t2/2(1-t/t)2t and Q(0) = Q(1) = 0. Moreover, we give an improvement for
the operator version ofWielandt inequality.
Convergence of iterates of q-Bernstein and (p,q)-Bernstein operators and the Kelisky-Rivlin type theorem
Authors: Rahman Shagufta , Mursaleen M. , Alkhaldi Ali
Published: April 2019

Recently, Radu [Note on the iterates of q and (p,q)-Bernstein operators,
Scientific Studies and Research, Series Mathematics and Informatics, 26(2)
(2016) 83-94] has investigated the convergence of iterates of q-Bernstein
polynomial and (p,q)-Bernstein polynomial with the aids of weakly Picard
operators theory. In this article, we establish Kelisky-Rivlin type theorem
on the power of the q-Bernstein operators for two dimensional case,
(p,q)-Bernstein operators and bivariate (p,q)-Bernstein operators by using contraction principle.
On the characteristic polynomial of power graphs
Authors: Ghorbani Modjtaba , Abbasi-Barfaraz Fatemeh
Published: April 2019

The power graph P(G) of finite group G is a graph whose vertex set is G and
two distinct vertices are adjacent if one is a power of the other. In this
paper, we determine the characteristic polynomial of the power graphs of
groups of order a product of three primes.
Application of double natural decomposition method for solving singular one dimensional Boussinesq equation
Authors: Gadain Hassan
Published: April 2019

In this work, a combined form of the double Natural transform method with the
Adomian decomposition method is developed for analytic treatment of the
linear and nonlinear singular one dimensional Boussinesq equations. Two
examples are provided to illustrate the simplicity and reliability of this
method. Moreover, the results show that the proposed method is effective and
is easy to implement for certain problems in science and engineering.
On fully coupled nonlocal multi-point boundary value problems of nonlinear mixed-order fractional differential equations on an arbitrary domain
Authors: Ahmad Bashir , Ntouyas Sotiris , Alsaedi Ahmed
Published: April 2019

We investigate the existence and uniqueness of solutions for a mixed-type
coupled fractional differential system equipped with nonlocal multi-point
coupled boundary conditions on an arbitrary domain by applying standard
tools of the fixed point theory. Our results, well illustrated with the aid
of examples, are new and enhance the scope of the literature on the topic.
F-lacunary statistical convergence and strong f-lacunary summability of order α
Authors: ŞengülHacer Ş , Et Mikail
Published: April 2019

The main object of this article is to introduce the concepts of f-lacunary
statistical convergence of order ? and strong f-lacunary summability of
order ? of sequences of real numbers and give some inclusion relations
between these spaces.
Accurate estimates of (1+x)1/x involved in Carleman inequality and Keller limit
Authors: Malesevic Branko , Hu Yue , Mortici Cristine
Published: April 2019

In this paper, using the Maclaurin series of the functions (1+x)1/x, some
inequalities from papers [2] and [5] are generalized. For arbitrary
Maclaurin series some general limits of Keller?s type are defined and
applying for generalization of some well known results.
Hereditary properties of semi-separation axioms and their applications
Authors: Han Sang-Eon
Published: April 2019

The paper studies the open-hereditary property of semi-separation axioms and
applies it to the study of digital topological spaces such as an
n-dimensional Khalimsky topological space, a Marcus-Wyse topological space
and so on. More precisely, we study various properties of digital
topological spaces related to low-level and semi-separation axioms such as
T1/2 , semi-T1/2 , semi-T1, semi-T2, etc. Besides, using the finite or the
infinite product property of the semi-Ti-separation axiom, i ? {1,2}, we
prove that the n-dimensional Khalimsky topological space is a semi-T2-space.
After showing that not every subspace of the digital topological spaces
satisfies the semi-Ti-separation axiom, i ?{1,2}, we prove that the
semi-Tiseparation property is open-hereditary, i ? {1,2}. All spaces in the
paper are assumed to be nonempty and connected.
Existence of solutions for a new version of generalized operator equilibrium problems
Authors: Karamian Ardeshir , Lashkaripour Rahmatollah
Published: April 2019

In this paper, a system of generalized operator equilibrium problems(for
short, SGOEP) in the setting of topological vector spaces is introduced.
Applying some properties of the nonlinear scalarization mapping and the
maximal element lemma an existence theorem for SGOEP is proved. Moreover,
using Ky Fan?s lemma an existence result for the generalized operator
equilibrium problem(for short, GOEP) is established. The results of the
paper can be viewed as a generalization and improvement of the corresponding
results given in [1,2,5,8].
Characterizations of Lie n-derivations of unital algebras with nontrivial idempotents
Authors: Ding Yana , Li Jiankui
Published: April 2019

Let A be a unital algebra with a nontrivial idempotent e, and f = 1-e.
Suppose that A satisfies that exe ? eAf = {0} = fAe ? exe implies exe = 0,
and that eAf ? fxf = {0} = fxf ?fAe implies fxf = 0 for each x in A.
For a Lie n-derivation ? on A, we obtain the necessary and sufficient
conditions for ? to be standard, i.e., ? = d + ?, where d is a derivation on
A, and is a linear mapping from A into the centre Z(A) vanishing on all (n-1)-th
commutators of A. Furthermore, we also consider
the sufficient conditions under which each Lie n-derivation on A can be standard.
Partial soft separation axioms and soft compact spaces
Authors: El-Shafei M.E. , Abo-Elhamayel M. , Al-Shami T.M.
Published: April 2019

The main aim of the present paper is to define new soft separation axioms
which lead us, first, to generalize existing comparable properties via
general topology, second, to eliminate restrictions on the shape of soft
open sets on soft regular spaces which given in [22], and third, to obtain a
relationship between soft Hausdorff and new soft regular spaces similar to
those exists via general topology. To this end, we define partial belong and
total non belong relations, and investigate many properties related to these
two relations. We then introduce new soft separation axioms, namely p-soft
Ti-spaces (i = 0,1,2,3,4), depending on a total non belong relation, and
study their features in detail. With the help of examples, we illustrate the
relationships among these soft separation axioms and point out that p-soft
Ti-spaces are stronger than soft Ti-spaces, for i = 0,1,4. Also, we define
a p-soft regular space, which is weaker than a soft regular space and verify
that a p-soft regular condition is sufficient for the equivalent among p-soft
Ti-spaces, for i = 0,1,2. Furthermore, we prove the equivalent among
finite p-soft Ti-spaces, for i = 1,2,3 and derive that a finite product of
p-soft Ti-spaces is p-soft Ti, for i = 0,1,2,3,4. In the last section,
we show the relationships which associate some p-soft Ti-spaces with soft
compactness, and in particular, we conclude under what conditions a soft
subset of a p-soft T2-space is soft compact and prove that every soft
compact p-soft T2-space is soft T3-space. Finally, we illuminate that some
findings obtained in general topology are not true concerning soft
topological spaces which among of them a finite soft topological space need
not be soft compact.
Certain properties of generalized Einstein spaces
Authors: Stankovic Vladislava
Published: April 2019

In the present paper are introduced generalized Einstein spaces. Einstein
type tensors are represented in the generalized Einstein spaces. Some
relations of Einstein type tensors of the first and the second kind in the
generalized Riemannian space are obtained. Also, geodesic mappings of
T-connected generalized Einstein spaces onto Riemannian space are
considered.
Closure operators on graphs for modeling connectedness in digital spaces
Authors: Slapal Josef
Published: April 2019

For undirected simple graphs, we introduce closure operators on their vertex
sets induced by sets of walks of the same lengths. Some basic properties of
these closure operators are studied, with greater attention paid to
connectedness. We focus on the closure operators induced by certain sets of
walks in the 2-adjacency graph on the digital line Z, which generalize the
Khalimsky topology. For the closure operators on Z2 obtained as particularly
defined products of pairs of the induced closure operators on Z, we
formulate and prove a digital form of the Jordan curve theorem.
The sum of the interior angles in geodesic and translation triangles of Sl2(R)~ geometry
Authors: Csima Géza , Szirmai Jenő
Published: April 2019

We study the interior angle sums of translation and geodesic triangles in the
universal cover of real 2 x 2 matrices with unit determinant, as, a Thurston
geometry denoted by P of SL2(R)~ geometry. We prove that the angle sum ?3i
=1(?i) ? ? for translation triangles and for geodesic triangles the angle
sum can be larger, equal or less than ?.
On some generalizations of Horadam’s numbers
Authors: Belbachir Hacène , Belkhir Amine
Published: April 2019

In this paper, we introduce the incomplete Horadam numbers Wn(k), and
hyper-Horadam numbers W(k)n, which generalize the Horadam?s numbers
defined by the recurrence Wn = pWn-1 + qWn-2, with W0 = a and W1 = b. We
give some combinatorial properties. As an application, we evaluate a lower
and upper bounds for the spectral norms of r-circulant matrices associated
with these two generalizations. Moreover, we establish a new bounds for the
spectral norms of r-circulant matrices associated with Horadam?s numbers in
terms of incomplete Horadam and hyper-Horadam numbers.
Spectral properties of n-normal operators
Authors: Chō Muneo , Nacevska Biljana
Published: April 2019

For a bounded linear operator T on a complex Hilbert space and n ? N, T is
said to be n-normal if T*Tn = TnT*. In this paper we show that if T is a
2-normal operator and satisfies ?(T) ? (-?(T)) ? {0}, then T is isoloid and
?(T) = ?a(T). Under the same assumption, we show that if z and w are
distinct eigenvalues of T, then ker(T-z)? ker(T-w). And if non-zero
number z ? C is an isolated point of ?(T), then we show that ker(T-z) is
a reducing subspace for T. We show that if T is a 2-normal operator
satisfying ?(T) ?(-?(T)) = 0, then Weyl?s theorem holds for T. Similarly,
we show spectral properties of n-normal operators under similar assumption.
Finally, we introduce (n,m)-normal operators and show some properties of
this kind of operators.
Bounds of some relative operator entropies in a general form
Authors: Nikoufar Ismail
Published: April 2019

In this paper, we determine the bounds of the generalized relative operator
entropy in general. In particular, we identify the bounds of the parametric
extension of the Shannon entropy and of the generalized Tsallis relative
operator entropy. Moreover, we improve the upper bound of the relative
operator entropy in some sense.
Space-like loxodromes on the canal surfaces in Minkowski 3-space
Authors: Sönmez Nilgün , Babaarslan Murat
Published: April 2019

In this paper, we obtain the differential equations of the space-like
loxodromes on the nondegenerate canal surfaces depending on the causal
characters of these canal surfaces and their meridians in Minkowski 3-space.
Also we give an example by using Mathematica computer programme.
Shells, sequences and intersections
Authors: Papini Luigi
Published: April 2019

In this paper we consider two facts concerning shells. First, we deal with
?nested? (decreasing or increasing) sequences of shells. We prove that the
intersection, as well as the closure of the union of these sequences, is a
shell. Secondly, we consider some questions raised in a paper by Stiles on
shells, published half century ago. He left open some questions, also
connected with ?spheres? (boundaries of balls), and with a finite
intersection property. Here we give a new result on these problems.
Reverse order law of Drazin inverse for bounded linear operators
Authors: Wang Hua , Huang Junjie
Published: April 2019

In this paper, the reverse order law of Drazin inverse is investigated under
some conditions in a Banach space. Moreover, the Drazin invertibility of sum
for two bounded linear operators are also obtained.
Achievement sets and sum ranges with ideal supports
Authors: Marchwicki Jacek
Published: April 2019

We introduce the notion of ideally supported achievement sets for a series of
real numbers. We analize their complexity and topological properties. We
compare the notion of ideal achievement sets with the notion of ideally
supported sum range of real series, considered by Filip?w and Szuca. We
complete Filip?w and Szuca characterization of ideal sum ranges, [R. Filip?w, P. Szuca, Rearrangement of conditionally convergent series on a small
set, J. Math. Anal. Appl. 362 (2010), no. 1, 64-71.], and we obtain some
generalization of Riemann?s Theorem.
Numerical solution of two dimensional nonlinear fuzzy Fredholm integral equations of second kind using hybrid of block-pulse functions and Bernstein polynomials
Authors: Mahaleh Vahid , Ezzati Reza
Published: April 2019

In this paper, first, we introduce a successive approximation method in terms
of a combination of Bernstein polynomials and block-pulse functions. The
proposed method is given for solving two dimensional nonlinear fuzzy
Fredholm integral equations of the second kind. Then, we present the
convergence of the proposed method. Also we investigate the numerical
stability of the method with respect to the choice of the first iteration.
Finally, two numerical examples are presented to show the accuracy of the
method.
On the breather waves, rogue waves and solitary waves to a generalized (2+1)-dimensional Caudrey-Dodd-Gibbon-Kotera-Sawada equation
Authors: Peng Wei-Qi , Tian Shou-Fu , Zhang Tian-Tian
Published: April 2019

In this paper, we consider a generalized (2+1)-dimensional
Caudrey-Dodd-Gibbon-Kotera- Sawada (CDGKS) equation. By using the Bell
polynomial, we derive its bilinear form. Based on the homoclinic breather
limit method, we construct the homoclinic breather wave and the rational
rogue wave solutions of the equation. Then by using its bilinear form, some
solitary wave solutions of the CDGKS equation are provided by a very natural
way. Moreover, some prominent characteristics for the dynamic behaviors of
these solitons are analyzed by several graphics. Our results show that the
breather wave can be transformed into rogue wave under the extreme behavior.
Microbiota-Produced N-Formyl Peptide fMLF Promotes Obesity-Induced Glucose Intolerance
Authors: Wollam Joshua , Riopel Matthew , Xu Yong-Jiang , Johnson Andrew M.F. , Ofrecio Jachelle M. , Ying Wei , El Ouarrat Dalila , Chan Luisa S. , Han Andrew W. , Mahmood Nadir A. , Ryan Caitlin N. , Lee Yun Sok , Watrous Jeramie D. , Chordia Mahendra D. , Pan Dongfeng , Jain Mohit , Olefsky Jerrold M.
Published: April 2019

The composition of the gastrointestinal microbiota and associated metabolites changes dramatically with diet and the development of obesity. Although many correlations have been described, specific mechanistic links between these changes and glucose homeostasis remain to be defined. Here we show that blood and intestinal levels of the microbiota-produced N-formyl peptide, formyl-methionyl-leucyl-phenylalanine, are elevated in high-fat diet–induced obese mice. Genetic or pharmacological inhibition of the N-formyl peptide receptor Fpr1 leads to increased insulin levels and improved glucose tolerance, dependent upon glucagon-like peptide 1. Obese Fpr1 knockout mice also display an altered microbiome, exemplifying the dynamic relationship between host metabolism and microbiota. Overall, we describe a new mechanism by which the gut microbiota can modulate glucose metabolism, providing a potential approach for the treatment of metabolic disease.