|
This article is cited in 13 scientific papers (total in 13 papers)
Mixed Type Hermite–Padé Approximants for a Nikishin System
V. G. Lysov Keldysh Institute of Applied Mathematics, Russian Academy of Sciences, Miusskaya pl. 4, Moscow, 125047 Russia
Abstract:
We consider the problem of mixed type Hermite–Padé approximants and prove that the Nikishin system is perfect for this problem. Using the method of a vector equilibrium problem, we find weak asymptotics and prove the convergence of the approximants along any rays in the index table. We also present an equivalent statement in the form of a matrix Riemann–Hilbert problem.
Keywords:
mixed type Hermite–Padé approximants, Nikishin system, perfect system, vector logarithmic-potential equilibrium problem, convergence of rational approximants, matrix Riemann–Hilbert problem.
Received: April 22, 2020 Revised: June 23, 2020 Accepted: July 21, 2020
Citation:
V. G. Lysov, “Mixed Type Hermite–Padé Approximants for a Nikishin System”, Analysis and mathematical physics, Collected papers. On the occasion of the 70th birthday of Professor Armen Glebovich Sergeev, Trudy Mat. Inst. Steklova, 311, Steklov Math. Inst., Moscow, 2020, 213–227; Proc. Steklov Inst. Math., 311 (2020), 199–213
Linking options:
https://www.mathnet.ru/eng/tm4146https://doi.org/10.4213/tm4146 https://www.mathnet.ru/eng/tm/v311/p213
|
Statistics & downloads: |
Abstract page: | 364 | Full-text PDF : | 76 | References: | 51 | First page: | 6 |
|