Korovkin type theorem and iterates of certain positive linear operators

Details Korovkin type theorem and iterates of certain positive linear operators Korovkin type theorem and iterates of certain positive linear operators

2010-12-06

arxiv.org/abs/1012.1187v1

Mathematics

Functional Analysis

Scientific paper

In this paper we prove Korovkin type theorem for iterates of general positive linear operators $T:C\left[ 0,1\right] \rightarrow C\left[ 0,1\right] $ and derive quantitative estimates in terms of modulus of smoothness. In particular, we show that under some natural conditions the iterates $T^{m}:C\left[ 0,1\right] \rightarrow C\left[ 0,1\right] $ converges strongly to a fixed point of the original operator $T$. The results can be applied to several well-known operators; we present here the $q$-MKZ operators, the $q$-Stancu operators, the genuine $q$-Bernstein--Durrmeyer operators and the Cesaro operators.

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