Lower bounds for the first eigenvalue of the laplacian, with dirichlet boundary conditions and a theorem of hayman
2009 ◽
Vol 11
(01)
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pp. 59-69
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2001 ◽
Vol 64
(3)
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pp. 381-393
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2005 ◽
Vol 2005
(13)
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pp. 2005-2010