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On the Approximation of the Classes $$ {W}_{\beta}^r{H}^{\alpha } $$ by Biharmonic Poisson Integrals |
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| Authors: | U Z Hrabova I V Kal’chuk T A Stepanyuk |
| Institution: | 1.L. Ukrainka East-European National University,Luts’k,Ukraine;2.Graz University of Technology,Graz,Austria |
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