Some planar isospectral domains

Details Some planar isospectral domains Some planar isospectral domains

2010-05-11

arxiv.org/abs/1005.1839v1

Mathematics

Differential Geometry

Version 1.0.1 dated 15 September 1994

Scientific paper

We give a number of examples of isospectral pairs of plane domains, and a particularly simple method of proving isospectrality. One of our examples is a pair of domains that are not only isospectral but homophonic: Each domain has a distinguished point such that corresponding normalized Dirichlet eigenfunctions take equal values at the distinguished points. This shows that one really can't hear the shape of a drum.

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