Abstract
At present, hypersingular integrals find an increasing number of fields of application—aerodynamics, elasticity theory, electrodynamics, and geophysics. Moreover, their calculation in an analytical form is possible only in particular special cases. Therefore, approximate methods for calculating hypersingular integrals are an urgent problem in computational mathematics. Many works are devoted to this problem. An even greater number of works are devoted to approximate methods for calculating singular integrals. Studies of approximate methods for calculating singular integrals began much earlier than similar studies of hypersingular integrals. Results have been obtained in this area that have no analogues for hypersingular integrals. It is of considerable interest to extend the methods for calculating singular integrals to hypersingular integrals, based on the connection between some classes of singular and hypersingular integrals. The work is devoted to this task. The construction of quadrature formulas for calculating hypersingular integrals is based on the methods of the constructive theory of functions and the theory of singular and hypersingular integrals. A method for constructing quadrature formulas for calculating hypersingular integrals is proposed that is based on the transformation of quadrature formulas for calculating singular integrals. Quadrature formulas for calculating several classes of hypersingular and polyhypersingular integrals are constructed. Estimates of the error of the constructed quadrature formulas are obtained. The constructed methods make it possible to efficiently calculate hypersingular integrals when solving applied problems.
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Funding
This work was supported financially by the Russian Foundation for Basic Research (grant no. 16-01-00594) and a Rector’s Grant of Penza State University (agreement no. 1/RG of August 4, 2020).
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Boykov, I.V., Aykashev, P.V. Approximate Methods for Calculating Hypersingular Integrals. Tech. Phys. 67, 448–455 (2022). https://doi.org/10.1134/S1063784222070039
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DOI: https://doi.org/10.1134/S1063784222070039