Construction of Optimal Quadrature Formulas Exact for Exponentional-trigonometric Functions by Sobolev’s Method - Boltaev, Aziz; Hayotov, Abdullo; Shadimetov, Kholmat (Acta mathematica Sinica. English series, 2021)
Keywords: Differential equations; Lagrange multiplier; Linear equations; Mathematical analysis; Mathematics; Mathematics and Statistics; Operators (mathematics); Quadratures; Trigonometric functions; discrete analogue; 65D30; 65D32; optimal coefficients; the error functional; The extremal function; 41A15; Sobolev’s method; 41A05