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Remarks on inverse of matrix polynomials

Fischer, Cyril, Náprstek, Jiří (2017)

Programs and Algorithms of Numerical Mathematics

Analysis of a non-classically damped engineering structure, which is subjected to an external excitation, leads to the solution of a system of second order ordinary differential equations. Although there exists a large variety of powerful numerical methods to accomplish this task, in some cases it is convenient to formulate the explicit inversion of the respective quadratic fundamental system. The presented contribution uses and extends concepts in matrix polynomial theory and proposes an implementation...

Remarks on the existence of nonoscillatory solutions of half-linear ordinary differential equations, II

Manabu Naito (2021)

Archivum Mathematicum

We consider the half-linear differential equation of the form ( p ( t ) | x ' | α sgn x ' ) ' + q ( t ) | x | α sgn x = 0 , t t 0 , under the assumption that p ( t ) - 1 / α is integrable on [ t 0 , ) . It is shown that if a certain condition is satisfied, then the above equation has a pair of nonoscillatory solutions with specific asymptotic behavior as t .

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