Chebyshev Splines and Kolmogorov Inequalities
By: by Sergey K. Bagdasarov
Series: Operator Theory Advances and Applications -- 105; Operator theory, advances and applications -- 105.
Publisher: Birkhäuser Basel; Imprint: Birkhäuser
Published: 1998
Place of publication: Basel
Language: eng
Format: [electronic resource] /
Number of pages: 210
ISBN-13: 9783034897815; 9783034888080
Subjects: Mathematics
Description: This monograph describes advances in the theory of extremal problems in classes of functions defined by a majorizing modulus of continuity w. In particular, an extensive account is given of structural, limiting, and extremal properties of perfect w-splines generalizing standard polynomial perfect splines in the theory of Sobolev classes. In this context special attention is paid to the qualitative description of Chebyshev w-splines and w-polynomials associated with the Kolmogorov problem of n-widths and sharp additive inequalities between the norms of intermediate derivatives in functional classes with a bounding modulus of continuity. Since, as a rule, the techniques of the theory of Sobolev classes are inapplicable in such classes, novel geometrical methods are developed based on entirely new ideas. The book can be used profitably by pure or applied scientists looking for mathematical approaches to the solution of practical problems for which standard methods do not work. The scope of problems treated in the monograph, ranging from the maximization of integral functionals, characterization of the structure of equimeasurable functions, construction of Chebyshev splines through applications of fixed point theorems to the solution of integral equations related to the classical Euler equation, appeals to mathematicians specializing in approximation theory, functional and convex analysis, optimization, topology, and integral equations .
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