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Fundamental systems of solutions of some linear differential equations of higher order

  • Jozef Fecenko EMAIL logo
Veröffentlicht/Copyright: 25. Februar 2025
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Abstract

The article deals with the issue of the existence of fundamental systems for solving some types of homogeneous linear differential equations with constant coefficients, which are created using higher derivatives of the so-called fundamental function. The first part of the article also partially expands on new information from the article [4]. Some interesting results are presented: Let f(x) = xn−1 sin βx be the fundamental function of the solutions to the differential equation (D2+β2)ny=0, then the sequence of derivatives Dkif(x)i=12n forms a fundamental system of solutions to this differential equation if the number of distinct even-order derivatives of f is equal to the number of distinct odd-order derivatives. Another result is that the set of n arbitrary distinct derivatives of the function f(x)=xn1eλx(λ0) forms the fundamental system of solutions to the differential equation (D − λ)ny = 0. While the article does not provide a comprehensive solution to the issue, it offers the potential for generalizing the presented results.

  1. (Communicated by Michal Fec̆kan)

References

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[3] Fecenko, J.: Matrix differential operator method of finding a particular solution to a nonhomogeneous linear ordinary differential equation with constant coefficients, https://arxiv.org/abs/2101.02037.Suche in Google Scholar

[4] Fecenko, J.: Other fundamental systems of solutions of the differential equation (D22αD+α2+β2ny = 0 β ≠ 0, Math. Slovaca 74(5) (2024), 1155–1164.10.1515/ms-2024-0083Suche in Google Scholar

[5] Fecenko, J.—Diekema, E.: On the linear (in)dependence of sequences of derivatives of the functions xn sin x and xn cos x, http://arxiv.org/abs/2305.11184Suche in Google Scholar

[6] Fecenko, J.—Chalmovianská, J.: Note on the fundamental sets of solution to the differential equations (D2 2 + α2 ± β2y = 0, Math. Slovaca 74(6) (2024), 1433–1444.10.1515/ms-2024-0103Suche in Google Scholar

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Received: 2024-05-06
Accepted: 2024-09-24
Published Online: 2025-02-25
Published in Print: 2025-02-25

© 2025 Mathematical Institute Slovak Academy of Sciences

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