Текст томруулах:    
Yulia E.Karpeshina

Perturbation Theory for the Schrodinger Operator with a Periondic Potential 1702 Lecture Notes in Mathematics - Berlin Springer 1997 - 351

English

3540631364

Introduction perturbation Theory Polyharmonic Operator in the Case of 2l>n Perturbation Theory for the Poyharmonic Operator in the Case of 4l>n+1