21 citations · 67 across the 20 of their papers we have counts for
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math.SP2018
Courant-sharp Robin eigenvalues for the square and other planar domains
Katie Gittins, Bernard Helffer
This paper is devoted to the determination of the cases where there is equality in Courant's nodal domain theorem in the case of a Robin boundary condition. For the square, we part…
math.SP2018★ 2 cited
Upper bounds for Courant-sharp Neumann and Robin eigenvalues
Katie Gittins, Corentin Léna
We consider the eigenvalues of the Laplacian on an open, bounded, connected set in with boundary, with a Neumann boundary condition or a Robin boundary conditi…