@article{JEDP_1994____A14_0, author = {Birman, Mikhail Sh.}, title = {Discrete spectrum of the periodic elliptic operator with a differential perturbation}, journal = {Journ\'ees \'equations aux d\'eriv\'ees partielles}, year = {1994}, pages = {1-4}, mrnumber = {1298685}, language = {en}, url = {http://dml.mathdoc.fr/item/JEDP_1994____A14_0} }
Birman, Mikhail Sh. Discrete spectrum of the periodic elliptic operator with a differential perturbation. Journées équations aux dérivées partielles, (1994), pp. 1-4. http://gdmltest.u-ga.fr/item/JEDP_1994____A14_0/
1. On the existence of eigenvalues of a divergence form operator A + λB in a gap of σ(A), Asymptotic Analysis 8 (4) (1994), 311-344. | MR 1278777 | MR 95g:47069 | Zbl 0806.47042
, , , ,2. Discrete spectrum of the periodic Schrödinger operator for non-negative perturbations, Operator Theory: Advances and Applications, vol. 70, Birkhäuser, Basel, 1994. | MR 1308998 | Zbl 0828.34075
,