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The lower estimate for linear positive operators,I |
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| Authors: | H. B. Knoop Xin-long Zhou |
| Affiliation: | 1. Department of Mathematics, University of Duisburg, D-47057, Duisburg, Germany |
| 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 |
| Keywords: | KeywordHeading" >AMS classification 41A36 41A40 41A27 41A10 |
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