About optimization of methods for mixed derivatives of bivariate functions

09/18/2023

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by   Y. V. Semenova, et al.

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The problem of optimal recovering high-order mixed derivatives of bivariate functions with finite smoothness is studied. On the basis of the truncation method, an algorithm for numerical differentiation is constructed, which is order-optimal both in the sense of accuracy and in terms of the amount of involved Galerkin information.