Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-20T00:16:51.506Z Has data issue: false hasContentIssue false

Eigenvalues of smooth kernels

Published online by Cambridge University Press:  24 October 2008

J. B. Reade
Affiliation:
Department of Mathematics, University of Manchester, Manchester M13 9PL

Extract

Suppose is a symmetric square integrable kernel on the unit square [0, 1]2. Then

is a compact symmetric operator on the Hilbert space L2[0, 1]. H. Weyl (see [2]) has shown that, if then the eigenvalues

of T satisfy as n → ∞. We prove a related result. Let W12[0, 1]2 denote the space of all K(x, t) ε L2[0, 1]2 which are absolutely continuous in x for each t and absolutely continuous in t for each x, and the partial derivatives ∂K/∂x(x, t), ∂K/∂t(x, t) are both in L2[0, 1]2. We slow that the eigenvalues of any satisfy .

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1984

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

[1] Reade, J. B.. On the sharpness of Weyl's estimate for the eigenvalues of smooth kernels. Siam J. Math. Anal. (To appear.)Google Scholar
[2] Weyl, H.. Das asymptotische Verteilungsgesetz der Eigenwerte linearer partieller Differentialgleichungen. Math. Ann. 71 (1912), 441479.CrossRefGoogle Scholar