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

Zh. Vychisl. Mat. Mat. Fiz., 2025 Volume 65, Number 10, Pages 1649–1661 (Mi zvmmf12060)

Ordinary differential equations

Localization of movable singularities of the Blasius equation

V. P. Varin

Keldysh Institute of Applied Mathematics of Russian Academy of Sciences, Moscow

Abstract: We study movable singularities of the Blasius equation in the complex plane. Numerical algorithms of their localization are given that allow to find singularities with high accuracy. All these singularities are equivalent and may be represented by one of them. We obtain an asymptotic expansion in the neighborhood of the singularity in explicit form and compute its coefficients. This power-logarithmic expansion is shown to be convergent and giving a local parametrization of the Riemann surface of the Blasius function.

Key words: Blasius function, Riemann surface of solution, movable singularities, high precision computations.

UDC: 519.624

Received: 18.04.2025
Revised: 19.06.2025
Accepted: 21.07.2025

DOI: 10.31857/S0044466925100037


 English version:
Computational Mathematics and Mathematical Physics, 2025, 65:10, 2362–2375

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© Steklov Math. Inst. of RAS, 2025