bluuebunny/crossref_metadata_2025_split huggingface dataset:
Some questions on the Fukui numerical set for complex function germs
Authors: Koike Satoshi , Parusiński Adam 
Published: May 2017

AbstractThe Fukui numerical set is known as a blow-analytic invariant for real analytic function germs. Taking into account the similarity between real blow-analytic properties and complex topological ones, we may ask if the Fukui numerical set is a topological invariant for complex analytic function germs. In this note we discuss the problem and give some related questions.
Polar invariants of plane curve singularities: intersection theoretical approach
Authors: Gwoździewicz Janusz , Lenarcik Andrzej , Płoski Arkadiusz 
Published: May 2017

AbstractThis article, based on the talk given by one of the authors at the Pierrettefest in Castro Urdiales in June 2008, is an overview of a number of recent results on the polar invariants of plane curve singularities.
Semi-compactness of almost Dunford–Pettis operators on Banach lattices
Authors: Aqzzouz Belmesnaoui , Elbour Aziz 
Published: May 2017

Abstract
We study the semi-compactness of positive Almost Dunford–Pettis (resp. the square of positive Almost Dunford–Pettis) operators on Banach lattices and we give some consequences.
On weakly BR-open functions and their characterizations in topological spaces
Authors: Caldas M. , Ekici E. , Jafari S. , Latif R. M. 
Published: May 2017

Abstract
In this paper, we introduce and study a new class of functions by using the notions of b-θ-open sets and b-θ-closure operator called weakly BR-open functions. The connections between this function and the other existing topological functions are studied.
Functional equations motivated by the Lagrange’s identity
Authors: Fechner Włodzimierz 
Published: May 2017

Abstract
We solve two functional equations motivated by the following Lagrange’s identity:

(

∑

i
=
1

n

a

i

b

i

)

2

=

(

∑

i
=
1

n

a

i
2

)

(

∑

i
=
1

n

b

i
2

)

-

∑

1
⩽
i
⩽
j
⩽
n

(

a

i

b

j

-

a

j

b

i

)

2

,

$$\left( {\sum\limits_{i = 1}^n {a_i b_i } } \right)^2 = \left( {\sum\limits_{i = 1}^n {a_i^2 } } \right)\;\left( {\sum\limits_{i = 1}^n {b_i^2 } } \right) - \sum\limits_{1 \le i \le j \le n} {\left( {a_i b_j - a_j b_i } \right)} ^2 ,$$

which is valid for every n ∈ ℕ and each a
1, . . . , an
, b
1, . . . , bn
from a commutative ring.
Generalized integration operators from Bloch type spaces to weighted BMOA Spaces
Authors: Sharma S. D. , Sharmat Anshu 
Published: May 2017

Abstract
In this paper, we consider a generalized integration operator

I

g
,
φ

(
n
)

f
(
z
)
=

∫
0
z

f

(
n
)

(
φ
(
ζ
)
)
g
(
ζ
)
d
ζ

$$I_{g,\varphi }^{(n)} f(z) = \int\limits_0^z {f^{(n)} (\varphi (\zeta ))g(\zeta )d\zeta } $$

induced by holomorphic maps g and φ of the open unit disk 𝔻, where φ(𝔻) ⊂ 𝔻 and n is a positive integer. We characterize boundedness and compactness of

I

g
,
φ

(
n
)

$I_{g,\varphi }^{(n)} $

from Bloch type spaces to weighted BMOA spaces by using logarithmic Carleson measure characterization of the weighted BMOA spaces.
Extended-order algebras as a generalization of posets
Authors: Solovyov Sergey A. 
Published: May 2017

Abstract
Motivated by the recent study of several researchers on extended-order algebras, introduced by C. Guido and P. Toto as a possible common framework for the majority of algebraic structures used inmany-valued mathematics, the paper focuses on the properties of homomorphisms of the new structures, considering extended-order algebras as a generalization of partially ordered sets. The manuscript also introduces the notion of extended-relation algebra providing a new framework for developing the theory of rough sets.
Weak homomorphisms between functorial algebras
Authors: Schneider Friedrich Martin 
Published: May 2017

AbstractIn universal algebra, homomorphisms are usually considered between algebras of the same similarity type. Different from that, the notion of a weak homomorphism, as introduced by E. Marczewski in 1961, does not depend on a signature, but only on the clones of term operations generated by the examined algebras. We generalize this idea by defining weak homomorphisms between
Global existence for abstract nonlinear Volterra–Fredholm functional integrodifferential equation
Authors: Dhakne M. B. , Kucche Kishor D. 
Published: May 2017

Abstract
In the present paper, we investigate the global existence of solutions to initial value problem for nonlinear mixed Volterra–Fredholm functional integrodifferential equations in Banach spaces. The technique used in our analysis is based on an application of the topological transversality theorem known as Leray–Schauder alternative and rely on a priori bounds of solution.
On contra ρ-continuous functions and strongly ρ-closed spaces
Authors: Pious Missier S. , Devamanoharan C. , Caldas M. , Jafari S. 
Published: May 2017

Abstract
In [4], Dontchev introduced and investigated a new notion of continuity called contra-continuity. Recently, Jafari and Noiri ([8], [9], [10]) introduced new generalization of contra-continuity called contra-super-continuity, contra-α-continuity and contra-precontinuity. It is the objective of this paper to introduce and study a new class of contra-continuous functions via ρ-closed sets.
A note on speed of convergence to the quasi-stationary distribution
Authors: Polak M. , Rolski T. 
Published: May 2017

Abstract
In this note we show that for Z being a birth and death process on ℤ or Brownian motion with drift and ℰ′ = (0, ∞), the speed of convergence to the quasistationary distribution is of order 1/t. The corresponding version that X is the number of calls in M/M/1 queue or the reflected Brownian motion is also considered. The result is obtained by asymptotic expansions of some transition functions. For this we use some new asymptotic expansion of the Bessel function.
On a new measure of dependence and its applications
Authors: Pawlas Piotr , Szynal Dominik 
Published: May 2017

Abstract
A new measure of dependence called pseudo-covariance and related to covariance is proposed. It can be applied in problems when the classic covariance fails. We show that it can be used as a measure of dependence of uncorrelated random variables and in characterizations of continuous distributions (here power distribution on (0, 1) and exponential distribution).
Remarks on restricted Nevanlinna transforms
Authors: Jankowski Lech , Jurek Zbigniew J. 
Published: May 2017

Abstract
The Nevalinna transform Ka

,

ρ
(z) of a positive measure ρ and a constant a, plays an important role in complex analysis and – more recently – in the context of the boolean convolution. We show here that its restriction to the imaginary axis, ka

,

ρ
(it), can be expressed as the Laplace transform of the Fourier transform (a characteristic function) of ρ. Consequently, ka ρ
is sufficient for the unique identification of the measure ρ and the constant a. Finally, we identify a relation between the free additive Voiculescu ⊞ and boolean ⊎ convolutions.
Some weakly contractive mapping theorems in partially ordered spaces and applications
Authors: Rhoades B. E. , Pathak H. K. , Mishra S. N. 
Published: May 2017

Abstract
The purpose of this paper is to present some fixed point theorems for certain weakly contractive mappings, known as weakly (φ − ψ)-contractive mappings, in a complete metric space endowed with a partial ordering. Subsequently, we apply our main results to obtain a solution of a first order periodic problem and study the possibility of optimally controlling the solutions of ordinary differential equations via dynamic programming.
On pinching theorems for compact pseudo-umbilical submanifold
Authors: Mao Jing , Qin Shaodong 
Published: May 2017

Abstract
Consider submanifolds in the nested space. For a compact pseudoumbilical submanifold with parallel mean curvature vector of a Riemannian submanifold with constant curvature immersed in a quasi-constant curvature Riemannian manifold, two sufficient conditions are given to let the pseudo-umbilical submanifold become a totally umbilical submanifold.
Some remarks on nonlinear discrete boundary value problems
Authors: Galewski Marek , Smejda Joanna 
Published: May 2017

Abstract
Using critical point theory and some monotonicity results we consider the existence and multiplicity of solutions to nonlinear discrete boundary value problems represented as a nonlinear system Au = λf(u) with parameter λ > 0 and with matrix A being not necessarily positive definite. We provide applications for discrete version of the Emden–Fowler equation.
Generalized Jordan left derivations in rings with involution
Authors: Oukhtite Lahcen 
Published: May 2017

AbstractIn the present paper we study generalized left derivations on Lie ideals of rings with involution. Some of our results extend other ones proven previously just for the action of generalized left derivations on the whole ring. Furthermore, we prove that every generalized Jordan left derivation on a 2-torsion free *-prime ring with involution is a generalized left derivation.
Weak and almost Dunford–Pettis operators on Banach lattices
Authors: Aqzzouz Belmesnaoui , Bouras Khalid 
Published: May 2017

Abstract
We introduce the class of Banach lattices with the AM-compactness property and we use it to characterize Banach lattices on which each positive weak Dunford–Pettis operator is almost Dunford–Pettis and conversely.
A fixed point theorem in generalized metric spaces
Authors: Kikina Luljeta , Kikina Kristaq 
Published: May 2017

Abstract
A generalized metric space has been defined by Branciari as a metric space in which the triangle inequality is replaced by a more general inequality. Subsequently, some classical metric fixed point theorems have been transferred to such a space. In this paper, we continue in this direction and prove a version of Fisher’s fixed point theorem in generalized metric spaces.
Density topology generated by the convergence everywhere except for a finite set
Authors: Górajska Magdalena , Wilczyński Władysław 
Published: May 2017

Abstract
In this paper we shall study a density-type topology generated by the convergence everywhere except for a finite set similarly as the classical density topology is generated by the convergence in measure. Among others it is shown that the set of finite density points of a measurable set need not be measurable.
R
cl-supercontinuous functions
Authors: Tyagi B. K. , Kohli J. K. , Singh D. 
Published: May 2017

Abstract
A new class of functions called ‘R
cl-supercontinuous functions’ is introduced. Their basic properties are studied and their place in the hierarchy of strong variants of continuity that already exist in the literature is elaborated. The class of R
cl-supercontinuous functions properly contains the class of cl-supercontinuous (≡ clopen continuous) functions (Applied Gen. Topology 8(2) (2007), 293–300; Indian J. Pure Appl. Math. 14(6) (1983), 767–772) and is strictly contained in the class of Rδ
-supercontinuous functions which in its turn, is properly contained in the class of R-supercontinuous functions (Demonstratio Math. 43(3) (2010), 703–723).
Oscillation of higher-order half-linear neutral differential equations
Authors: Tang Shuhong , Li Tongxing , Thandapani E. 
Published: May 2017

Abstract
In this paper, we establish some new oscillation criteria for the higher-order half-linear neutral differential equation

[

a
(
t
)

(

[
x
(
t
)
+
p
(
t
)
x
(
σ
(
t
)
)
]

(
n
−
1
)

)

γ

]

′

+
q
(
t
)

x
γ

(
τ
(
t
)
)
=
0
.

$$\left[ {a(t)\,\,\left( {[x(t) + p(t)x(\sigma (t))]^{(n - 1)} } \right)^\gamma } \right]^\prime + q(t)x^\gamma (\tau (t)) = 0.$$

An example is given to illustrate the main results.
The Nemitskij operator on Lipk
-type and BVk
-type spaces
Authors: Giménez José , López Lorena , Merentes N. 
Published: May 2017

Abstract
In this paper, we discuss and present various results about acting and boundedness conditions of the autonomous Nemitskij operator on certain function spaces related to the space of all real valued Lipschitz (of bounded variation, absolutely continuous) functions defined on a compact interval of ℝ. We obtain a result concerning the integrability of products of the form ψ ο f · f′ · f
(

k

) and a generalized version of the chain rule for functions a.e differentiable, in the sense of Lebesgue. As an application, we get a generalization of a theorem due to V. I. Burenkov for the case of functions of bounded Riesz-p-variation.
Differential subordinations and superordinations for p-valent functions defined by fractional derivative operator
Authors: Amsheri Somia Muftah , Zharkova Valentina 
Published: May 2017

Abstract
In the present paper, we derive some subordination and superordination results for p-valent functions in the open unit disk by using certain fractional derivative operator. Relevant connections of the results, which are presented in the paper, with various known results are also considered.
Extreme points and support points of a class of analytic functions with missing coefficients
Authors: Xiong Liangpeng , Tian Lin , Luo Shaoxi , Liu Xiaoli 
Published: May 2017

Abstract
Let ℳ
n
(a, b, c) denote a class of functions of the form f(z) = z − an

+1
z

n+1 − … − akzk
− … which are analytic in open unit disk U = {z : |z| < 1} and satisfy the condition

∑

k
=
n
+
1

∞

k
(
k
+
a
)

k
+
b

a
k

<
c
,

a
k

≥
0
,

a
≥
b
≥
0
,

0
<
c
≤
1
,

n
∈
N
=
{
1
,
2
,
…
}
.

$$\sum\limits_{k = n + 1}^\infty {{{k(k + a)} \over {k + b}}a_k < c,\;\;\;a_k \ge 0,\;\;\;a \ge b \ge 0,\;\;\;0 < c \le 1,\;\;\;n \in N = \{ 1,2, \ldots \} .} $$

In this paper, we obtain the extreme points and support points of the class ℳ
n
(a, b, c) of functions.
The relationship between anxiety, depression and risk behaviors in adolescents
Authors: Soleimani Mohammad Ali , Pahlevan Sharif Saeed , Bahrami Nasim , Yaghoobzadeh Ameneh , Allen Kelly A. , Mohammadi Sepideh 
Published: May 2017

AbstractAimAdolescence is a developmental period often associated with high-risk behaviors. While some risk-taking behavior is considered normative in adolescents, research has indicated an association between risky behaviors and mental ill-health. The current research aimed to examine the relationship between anxiety and depression with the occurrence of high-risk behaviors in adolescents and also determine the predictive factors of these main variables.MethodsA descriptive, cross-sectional, correlational design was used to collect data from 399 adolescents between the ages of 14 and 19 residing in Qazvin, Iran using the Revised Child Anxiety and Depression Scale (RCADS) and the Iranian Adolescents Risk-taking Scale (IARS) between the period of October and November 2015. Data analysis included descriptive and inferential statistics powered by SPSS (v. 23).ResultsMean scores for anxiety, depression and risky behaviors were 37.70 ± 21.11 and 80.76 ± 31.30, respectively. Participants’ frequency of suicidal thoughts (β = 0.126, p < 0.05) positively predicted anxiety and depression, while age (β = −0.126, p < 0.01) and self-confidence (β = −0.307, p < 0.001) negatively predicted anxiety and depression. Moreover, having friends that smoke (β = 0.366, p < 0.001), suicidal thoughts (β = 0.127, p < 0.01), and the strength of suicidal thoughts (β = 0.100, p < 0.05) were positive predictors of occurrence of risky behaviors. Furthermore, religious belief (β = −0.204, p < 0.001) negatively predicted occurrence of risky behaviors in Iranian adolescents. Male respondents were more likely to have higher level of occurrence of risky behaviors than females (β = −0.193, p < 0.001).ConclusionFindings of the present study suggest that anxiety and depression positively and significantly predict the occurrence of risky behaviors in addition to having friends that smoke, suicidal thoughts, and strong suicidal thinking. The implications of these findings have relevance for screening, prevention, and treatment interventions targeting mental health in adolescents.
Study on a Harmonic Measurement and Analysis Method for Power Supply System
Authors: Wu Tiecheng , Jiang Dao , Wang Yazi , Lei Aiju 
Published: May 2017

Abstract
In the power supply system of high speed railway, the generated harmonics can not only influence the electric energy quality of power system, occur the voltage fluctuation and flicker, and affect the service life of traction equipment and traction transformer of electric power substation, but also cause the secondary protection misoperation of automatic control system, and affect the normal operation of the train. With the increase of overhead contact line transmission, the generated harmonics increased the communication interference. Therefore, on the basis of analyzing the generation and spectrum of harmonics in power system, an improved S transform method is introduced in order to propose a harmonic measurement and analysis method based on improved S transform for power supply system of high speed railway in this paper. The proposed method can effectively realize the harmonic measurement and analysis of power supply system. In order to testify the effectiveness of the proposed harmonic measurement and analysis method, Yingkou substation of Harbin-Dalian high speed railway is selected in here. The actual analysis calculation and experiment results show that the proposed method can effectively measure and analyze the harmonic in the power supply system of high speed railway. It provides a theoretical basis for solving the practical engineering problem of power supply.
The Hermitian Positive Definite Solution of the Nonlinear Matrix Equation
Authors: Zhang Xindong , Feng Xinlong 
Published: May 2017

Abstract:
In this paper, we study the nonlinear matrix equation

X

s

±

∑

i
=
1

m

A

i

T

X

δ

i

A

i

=
Q

$X^{s}\pm\sum^{m}_{i=1}A^{T}_{i}X^{\delta_{i}}A_{i}=Q$

, where

A

i

(
i
=
1
,
2
,
…
,
m
)

$A_{i}\;(i=1,2,\ldots,m)$

is

n
×
n

$n\times n$

nonsingular real matrix and

Q

$Q$

is

n
×
n

$n\times n$

Hermitian positive definite matrix. It is shown that the equation has an unique Hermitian positive definite solution under some conditions. Iterative algorithms for obtaining the Hermitian positive definite solution of the equation are proposed. Finally, numerical examples are reported to illustrate the effectiveness of algorithms.
Wendeliteratur – Literatur der Wende? Der Mauerfall in ausgewählten Werken der deutschen Literatur
Authors: Leier Nicole 
Published: May 2017

Zusammenfassung
Das historische Ereignis der Wende gehört zu einem der bedeutendsten Stoffe der zeitgenössischen deutschsprachigen Literatur. Der Zeitpunkt der Entstehung hat dabei einen nicht zu unterschätzenden Einfluss auf Form und Stil des literarischen Werkes: Von einer zunächst eher ironisch geprägten Herangehensweise über einen nostalgisch-verklärenden Ansatz bis zu den jetzigen Tendenzen klassischen Erzählens wird in dem vorliegenden Aufsatz beispielhaft dargelegt, wie sich der Blickwinkel der Autoren auf die Wendeereignisse verändert und wie diese unterschiedlichen literarischen Zeugnisse im Deutschunterricht eingesetzt werden können.
Studiengang Fachdeutsch Wirtschaft mit Schwerpunkt Agrar- und Ernährungsindustrie an der Universität Thiès / Senegal
Authors: Gueye Ousmane 
Published: May 2017

Zusammenfassung
An der neu gegründeten Universität zu Thiès in der westafrikanischen Republik Senegal ist im Rahmen der »Langues Etrangères Appliquées« (LEA) eine Fachfremdsprachen-Abteilung errichtet worden, an der u.a. Deutsch als Wirtschaftssprache in einem dreijährigen Studiengang unterrichtet wird. Die Studienreform richtet sich formal an den Zielen des Bologna-Prozesses aus. Dem neuen Lernprogramm liegen Ansätze zugrunde, die für eine Neuorientierung des Wirtschaftsdeutsch-Unterrichts im senegalesischen Raum plädieren. Im Gegensatz zu bislang existierenden LEA-Abteilungen (Universität Cheikh Anta Diop de Dakar und Gaston Berger de Saint Louis) umfasst die Ausbildung an der Universität de Thiès auch eine Einführung in die deutschsprachige Literatur; der Akzent der fachsprachlichen Ausbildung liegt auf Fachlexik, Fachsprachengrammatik sowie Fachtext. Einen Schwerpunkt bildet die Ausbildung im Sektor Agrar- und Ernährungsindustrie, womit in unmittelbarer Praxisrelevanz u.a. lokale Produkte gefordert werden. Hauptlernziel der Ausbildung ist die qualifizierte Teilnahme an in der Agrar- und Ernährungswirtschaft typischerweise vorkommenden Kommunikationssituationen.
Intertextualität und fremdsprachliches Lernen in Südosteuropa. Zur Verbindung von sprach-, literatur- und landeskundedidaktischen Unterrichtsstrategien am Beispiel von Texten Johann Wolfgang von Goethes, Franz Kafkas und Christian Krachts
Authors: Fornoff Roger 
Published: May 2017

Zusammenfassung
Vor dem Hintergrund einer kritischen Situationsbeschreibung des universitären Literaturunterrichts an südosteuropäischen Germanistiken wird ein alternatives, aus dem literaturwissenschaftlichen Bereich entwickeltes Unterrichtskonzept vorgestellt, das anhand der Auseinandersetzung mit drei Romananfängen der deutschen Literatur (Goethe: Wahlverwandtschaften [1809], Kafka: Der Verschollene [1927] und Kracht: Faserland [1995]) literarische, sprachliche und landeskundliche Lernprozesse zusammenführt. Methodisch orientiert sich das Vermittlungskonzept, das im Sommersemester 2011 am Lehrstuhl für Germanistik der Universität Belgrad erfolgreich durchgeführt wurde, an Julia Kristevas poststrukturalistisch inspirierter Intertextualitätstheorie. Sie wird insofern für fremdsprachendidaktische Zwecke adaptiert, als die ausgewählten Romananfänge innerhalb der vorgestellten Unterrichtsreihe den Ausgangspunkt für eine Vielzahl von intertextuellen Vernetzungen bilden, indem sie a) miteinander über narratologische und literarhistorische Gesichtspunkte verknüpft b) mit selbstverfassten Texten der Studierenden in ein Verhältnis gesetzt und c) in den Kontext nichtfiktionaler Texte gestellt werden, die in dezidiert fremdsprachendidaktischer Perspektive ihre landeskundlich-kulturbezogenen Bedeutungsaspekte aufgreifen. Mit dieser Verfahrensweise verbindet sich die Absicht, die literarischen Ausgangstexte über den Nachvollzug von intertextuellen Bezügen, Relationen und Verweisungen inhaltlich, formal und stilistisch zu erhellen und als Träger sowohl von unmittelbar (fremd-)sprachlichen als auch von literarisch-literaturhistorischen, fremdkulturell-landeskundlichen und personal-subjektgebundenen Sinn- und Bedeutungsgehalten zu dechiffrieren. Der Artikel mündet in ein Referat der Evaluation des Unterrichtskonzepts durch die Studierenden und damit in eine Reflexion über dessen Stärken und Schwächen.
Zur Mündlichkeit im Deutschen als Fremdsprache aus der Sicht von Studierenden der Germanistik
Authors: Grzeszczakowska-Pawlikowska Beata 
Published: May 2017

Zusammenfassung
Der vorliegende Beitrag reiht sich in die Forschung zur gesprochenen Sprache im Deutschen als Fremdsprache ein. Im Mittelpunkt des Interesses steht die Language Awareness polnischer Germanistikstudenten im Hinblick auf die Sprechfertigkeit in der Zielsprache in der institutionellen philologischen Ausbildung. Zu diesem Zweck wurde eine Studentenbefragung durchgeführt, deren Ergebnisse hier dargestellt und kommentiert werden. Es wird davon ausgegangen, dass die Einstellung der Studierenden zur Entwicklung der Mündlichkeit im Germanistikstudium positiv bzw. negativ die Effizienz von Lehr- und Lernprozessen beeinflusst.
»Die Falle« – Ein Theaterprojekt im universitären DaF-Unterricht
Authors: Zucchi Matthias 
Published: May 2017

Zusammenfassung
Auch im DaF-Unterricht hat sich das Mitte der 1990er Jahre in den Unterricht gebrachte Drama-in-Education bereits vielfach bewährt. Es bildet zum einen den Ausgangspunkt für umfassende sprach-, literatur- und landeskundliche Lerneinheiten, zum anderen gewährleistet es die auch vom interkulturellen Ansatz geforderte Ganzheitlichkeit des Lernprozesses. Am Beispiel eines Theaterprojekts im Rahmen des Deutschlektorats an der Universität Venedig wird aufgezeigt, wie sich der DaF-Unterricht über Theaterarbeit nachhaltig verbessern lässt.