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JOURNALS // Zhurnal Vychislitel'noi Matematiki i Matematicheskoi Fiziki // Archive

Zh. Vychisl. Mat. Mat. Fiz., 2024 Volume 64, Number 12, Pages 2303–2311 (Mi zvmmf11890)

General numerical methods

Quadrature formulas for singular integrals containing the values of a function and its derivatives

Sh. S. Khubezhtyabc, L. Yu. Plievaabc

a North Ossetian State University after Kosta Levanovich Khetagurov, 362025, Vladikavkaz, North Ossetia–Alania Republic, Russia
b Southern Mathematical Institute of the Vladikavkaz Scientific Center of the Russian Academy of Sciences, 362025, Vladikavkaz, North Ossetia–Alania Republic, Russia
c Financial University under the Government of the Russian Federation, Vladikavkaz Branch, 362002, Vladikavkaz, North Ossetia–Alania Republic, Russia

Abstract: Quadrature formulas for singular integrals on the integration interval $[-1,1]$ with certain weight functions $p(t)$ are constructed. The formulas use the values of the function and its derivatives at the zeros of the Chebyshev polynomial. The resulting formulas are quadrature formulas of the interpolation type and have an algebraic degree of accuracy $2m-1$. The error estimate is given.

Key words: singular integrals, quadrature formula, nodes, derivative of a function, weight function, interpolation polynomial, remainder term.

UDC: 517.38

Received: 18.04.2024
Revised: 18.04.2024
Accepted: 23.08.2024

DOI: 10.31857/S0044466924120064


 English version:
Computational Mathematics and Mathematical Physics, 2024, 64:12, 2813–2822

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© Steklov Math. Inst. of RAS, 2026