Download Approximation by Max-Product Type Operators by Barnabás Bede, Lucian Coroianu, Sorin G. Gal PDF

By Barnabás Bede, Lucian Coroianu, Sorin G. Gal

ISBN-10: 331934188X

ISBN-13: 9783319341880

ISBN-10: 3319341898

ISBN-13: 9783319341897

This monograph provides a large therapy of advancements in a space of optimistic approximation related to the so-called "max-product" variety operators. The exposition highlights the max-product operators as these which permit one to acquire, in lots of situations, extra invaluable estimates than these received via classical methods. The textual content considers a large choice of operators that are studied for a couple of fascinating difficulties comparable to quantitative estimates, convergence, saturation effects, localization, to call several.

Additionally, the booklet discusses the suitable analogies among the probabilistic ways of the classical Bernstein variety operators and of the classical convolution operators (non-periodic and periodic cases), and the possibilistic techniques of the max-product variations of those operators. those ways let for 2 traditional interpretations of the max-product Bernstein sort operators and convolution variety operators: first of all, as possibilistic expectancies of a few fuzzy variables, and secondly, as bases for the Feller kind scheme when it comes to the possibilistic vital. those methods additionally supply new proofs for the uniform convergence in response to a Chebyshev kind inequality within the conception of possibility.

Researchers within the fields of approximation of capabilities, sign idea, approximation of fuzzy numbers, photo processing, and numerical research will locate this publication most valuable. This publication is usually an outstanding reference for graduates and postgraduates taking classes in approximation theory.

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Extra info for Approximation by Max-Product Type Operators

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Remarks. x/ D sin x Ä 0, for all x 2 Œ0; 1. k=n/ are involved. nC1// . 1). 2)). f I ı/ ı for ı Ä 1, which shows that the order of approximation obtained in this case by the linear Bernstein operator is exactly p1n . 10 we get that the order of approximation by the max-product Bernstein operator is less than 1 , which is essentially better than p1n . 11 and n by the Remark after this corollary, we can produce many subclasses of functions for which the order of approximation given by the max-product Bernstein operator is essentially better than the order of approximation given by the linear Bernstein operator.

Ai /I i 2 Ig for all Ai 2 ˝, and any I, an at most countable family of indices (if ˝ is finite, then obviously I must be finite too). B/. ˝/ ! s/I s 2 Ag, for all A ˝. For each fuzzy (possibilistic) variable X W ˝ ! R, we can define its distribution measure with respect to a possibility measure P induced by a possibility distribution , by the formula PX W B ! f! / 2 Bg/; B 2 B; where RC D Œ0; C1/ and B is the class of all Borel measurable subsets in R. It is clear that PX is a possibility measure on B, induced by the possibility distribution defined by X W R !

0; 1/ is nonincreasing and such that the function h W Œ0; 1/ ! 1 f I n 38 2 Approximation by Max-Product Bernstein Operators Proof. 1 f I n Remark. By simple reasonings, it follows that if f W Œ0; 1 ! 0; 1 ! 11, (i). x/, x 2 Œ0; 1. 0; 1. 1/, for x 1 x all x 2 Œ0; 1/, passing to limit with x ! x/ is nonincreasing. x/ D ex , x 2 Œ0; 1. Analogously, if f W Œ0; 1 ! 11, (ii). x/ D e x , x 2 Œ0; 1. In what follows we will present some shape preserving properties, by proving that the max-product Bernstein operator preserves the monotonicity and the quasiconvexity.

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