Perturbations A T A_T of a selfadjoint operator A A by symmetric finite rank operators T T from H 2 ( A ) H_2 (A) to H − 2 ( A ) H₋₂ (A) are studied. The finite dimensional family of selfadjoint extensions determined by A T A_T is given explicitly.
No takes yet. Share an insight, caveat, or question.
Albeverio et al. (1999) studied this question.