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Eigenfunction Decay For the Neumann Laplacian on Horn-Like Domains

  Published:2000-03-01
 Printed: Mar 2000
  • Julian Edward
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Abstract

The growth properties at infinity for eigenfunctions corresponding to embedded eigenvalues of the Neumann Laplacian on horn-like domains are studied. For domains that pinch at polynomial rate, it is shown that the eigenfunctions vanish at infinity faster than the reciprocal of any polynomial. For a class of domains that pinch at an exponential rate, weaker, $L^2$ bounds are proven. A corollary is that eigenvalues can accumulate only at zero or infinity.
Keywords: Neumann Laplacian, horn-like domain, spectrum Neumann Laplacian, horn-like domain, spectrum
MSC Classifications: 35P25, 58G25 show english descriptions Scattering theory [See also 47A40]
unknown classification 58G25
35P25 - Scattering theory [See also 47A40]
58G25 - unknown classification 58G25
 

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