The diagram $(\hat{I}{»}_1,\hat{I}{¼}_1)$

Ilias Ftouhi, Antoine Henrot

In this paper, we are interested in the possible values taken by the pair $(\hat{I}{»}_1(\hat{I}\text{c◯}),\hat{I}{¼}_1(\hat{I}\text{c◯}))$ the first eigenvalues of the Laplace operator with Dirichlet and Neumann boundary c…