Domains for Dirac–Coulomb min-max levels
Domains for Dirac–Coulomb min-max levels
We consider a Dirac operator in three space dimensions, with an electrostatic (i.e., real-valued) potential V(x) , having a strong Coulomb-type singularity at the origin. This operator is not always essentially self-adjoint but admits a distinguished self-adjoint extension D_V . In a first part we obtain new results on the …