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Ключові слова:
кінцеві елементи, конечные элементы, finite Elemente, finite elements ; рівняння Гельмгольца, уравнения Гельмгольца
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Анотація:
In this paper, after an examination of the spectrum of the system matrix of the discrete vector Helmholtz equation, a novel technique that makes edge finite element matrices more suitable for Lanczos-based solvers is introduced. This technique works by displacing the eigenvalues related to static modes to a more favorable part of the spectrum. The displacement is achieved by means of a matrix that is added to the system matrix.
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