Small eigenvalues on Riemann surfaces of genus 2 (Q1191362)
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scientific article; zbMATH DE number 59797
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Small eigenvalues on Riemann surfaces of genus 2 |
scientific article; zbMATH DE number 59797 |
Statements
Small eigenvalues on Riemann surfaces of genus 2 (English)
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27 September 1992
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Let \(M\) be a closed Riemannian surface of genus \(g\geq2\) with a metric of constant curvature \(-1\) and let \(0\leq\lambda_{1}\leq\lambda_{2}...\) be the eigenvalues of the Laplacian where each eigenvalue is repeated according to its multiplicity. An eigenvalue is said to be small if the eigenvalue is less than \(1/4\); \(0\) is a small eigenvalue. It is known that there are surfaces with \(2g-2\) small eigenvalues; the author proved earlier that there are at most \(4g-4\) small eigenvalues. The author conjectured that \(2g-2\) is the appropriate bound; the conjecture is proved for \(g=2\) in this paper.
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constant curvature
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Laplacian
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0.9042648
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0.8778565
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