On the isoperimetric inequality for the magnetic Robin Laplacian with negative boundary parameter
arXiv:2108.05256 · doi:10.1007/s12220-022-00917-z
Abstract
We consider the magnetic Robin Laplacian with a negative boundary parameter. Among a certain class of domains, we prove that the disk maximizes the ground state energy under the fixed perimeter constraint provided that the magnetic field is of moderate strength. This class of domains includes, in particular, all domains that are contained upon translations in the disk of the same perimeter and all convex centrally symmetric domains.
The hypothesis in Proposition 4.4 is that the domain is convex and centrally symmetric (convexity was missing in the previous version)