The lower estimate for linear positive operators,I |
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| Authors: | H B Knoop Xin-long Zhou |
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| Institution: | 1. Department of Mathematics, University of Duisburg, D-47057, Duisburg, Germany
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| Abstract: | A method to prove lower estimates for linear operators is introduced. As a result the best lower estimate for certain convolution operators, for the multivariate Bernstein-Durrmeyer operators in part I and the Bernstein polynomial operators in part II (see 10]), are obtained.Communicated by Hubert Berens |
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| Keywords: | AMS classification" target="_blank">AMS classification 41A36 41A40 41A27 41A10 |
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