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A numerical method for solving the Cauchy problem for ODEs using a system of polynomials generated by a system of modified Laguerre polynomials
G. G. Akniev, R. M. Gadzhimirzaev Department of Mathematics and Computer Science, Dagestan Federal research center of the RAS
Abstract:
In this paper, we consider a numerical realization of an iterative method for solving the Cauchy problem for ordinary differential equations, based on representing the solution in the form of a Fourier series by the system of polynomials
$\{L_{1,n}(x;b)\}_{n=0}^\infty$, orthonormal with respect to the Sobolev-type inner product
$$
\langle f,g\rangle=f(0)g(0)+\int_{0}^\infty f'(x)g'(x)\rho(x;b)dx
$$
and generated by the system of modified Laguerre polynomials $\{L_{n}(x;b)\}_{n=0}^\infty$, where $b>0$. In the approximate calculation of the Fourier coefficients of the desired solution, the Gauss–Laguerre quadrature formula is used.
Keywords:
Laguerre polynomials, ordinary differential equation (ODE), Cauchy problem, inner product of Sobolev-type, Gauss–Laguerre quadrature formula.
Received: 14.08.2019 Revised: 14.11.2019 Accepted: 15.11.2019
Citation:
G. G. Akniev, R. M. Gadzhimirzaev, “A numerical method for solving the Cauchy problem for ODEs using a system of polynomials generated by a system of modified Laguerre polynomials”, Daghestan Electronic Mathematical Reports, 2019, no. 12, 13–24
Linking options:
https://www.mathnet.ru/eng/demr74 https://www.mathnet.ru/eng/demr/y2019/i12/p13
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Abstract page: | 125 | Full-text PDF : | 41 | References: | 26 |
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