5 citations · 35 across the 32 of their papers we have counts for
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math.SP2016
On the semi-classical analysis of the groundstate energy of the Dirichlet Pauli operator
Bernard Helffer, Mikael Persson Sundqvist
We discuss the results of a recent paper by Ekholm, Kovařík and Portmann in connection with a question of C. Guillarmou about the semiclassical expansion of the lowest eigenvalue o…
math.SP2016
Pleijel's theorem for Schrödinger operators with radial potentials
Philippe Charron, Bernard Helffer, Thomas Hoffmann-Ostenhof
In 1956 . Pleijel gave his celebrated theorem showing that the inequality in Courant's theorem on the number of nodal domains is strict for large eigenvalues of the Laplacian. T…