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A Lower Bound for the Fundamental Frequency of a Convex Region
M. H. Protter
Proceedings of the American Mathematical Society
Vol. 81, No. 1 (Jan., 1981), pp. 65-70
Published by: American Mathematical Society
Stable URL: http://www.jstor.org/stable/2043987
Page Count: 6
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A lower bound for the first eigenvalue of the Laplace operator is obtained in terms of the radius of the largest ball which can be inscribed in a convex region in $R^n, n \geqslant 2$.
Proceedings of the American Mathematical Society © 1981 American Mathematical Society