Density results for the Helmholtz equation and the method of fundamental solutions
Alves, Carlos J. S.
Advances in Computational Engineering & Sciences - Volume I (Editors: S. N. Atluri and F. W. Brust), Tech Sc. Press (2000), pp.45-50
https://web.tecnico.ulisboa.pt/~ist12831/proc/2000-Alves_AdvCompEngSc.pdf
Density results obtained on the boundary of the obstacle using some specific sets of point-sources allow a further justification on the possible location of those points while considering the implementation of the method of fundamental solutions.
Numerical examples are presented for admissible and non-admissible sets of point-sources.
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