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Negative Results in Form-Preserving Approximation of Higher Order |
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| Authors: | Bondarenko A. V. Primak A. V. |
| Affiliation: | 1. T. Shevchenko Kiev National University, Ukraine |
| Abstract: | It is proved that for q-convex polynomial approximations, where $q geqslant 4$ , inequalities of Jackson type are not valid even with a constant depending on the approximated function. |
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