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Geometric bounds on the low eigenvalues of a compact surface. (English) Zbl 0446.58018
Geometry of the Laplace operator, Honolulu/Hawaii 1979, Proc. Symp. Pure Math., Vol. 36, 279-285 (1980).

58J50 Spectral problems; spectral geometry; scattering theory on manifolds
53C20 Global Riemannian geometry, including pinching
53C22 Geodesics in global differential geometry
58C40 Spectral theory; eigenvalue problems on manifolds