For the problem of numerical differentiation of bivariate functions with mixed smoothness, we determine the exact orders for the minimal radius of Galerkin information and construct a truncation method, which is optimal in a sense of the indicated quantity.
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Translated from Ukrains’kyi Matematychnyi Zhurnal, Vol. 74, No. 2, pp. 253–273, February, 2022. Ukrainian DOI: https://doi.org/10.37863/umzh.v74i2.6906.
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Solodky, S.G., Stasyuk, S.A. Optimization of the Methods of Numerical Differentiation for Bivariate Functions. Ukr Math J 74, 289–313 (2022). https://doi.org/10.1007/s11253-022-02064-8
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DOI: https://doi.org/10.1007/s11253-022-02064-8