论文信息 - Courant-sharp Robin eigenvalues for the square: The case of negative Robin parameter

Courant-sharp Robin eigenvalues for the square: The case of negative Robin parameter

We consider the cases where there is equality in Courant’s nodal domain theorem for the Laplacian with a Robin boundary condition on the square. In our previous two papers, we treated the cases where the Robin parameter h > 0 is large, small respectively. In this paper we investigate the case where h < 0.

Bernard Helffer | Katie Gittins

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