The celebrated Faber-Krahn Theorem gives an important isoperimetric inequality concerning Dirichlet eigenvalues. It states that the ball has lowest first Dirichlet eigenvalue amongst all bounded domains of the same volume in R (with the standard Euclidean metric). It has been first conjectured by Rayleigh and proved independently by Faber [61] and Krahn [118] for the R; a proof of the generalized version can be found for example in [29]. The Faber-Krahn theorem can also be rephrased in the following way: for all drums with the same area and same tension the circular-shaped has the lowest tone.
Keywords
- Connected Graph
- Normal Derivative
- Boundary Edge
- Small Root
- Degree Sequence
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© 2007 Springer-Verlag Berlin Heidelberg
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(2007). Faber-Krahn Type Inequalities. In: Laplacian Eigenvectors of Graphs. Lecture Notes in Mathematics, vol 1915. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-73510-6_6
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