共 50 条
- [1] ON PERTURBATION OF A POLYHARMONIC OPERATOR BY DELTA-LIKE POTENTIALS MATHEMATICS OF THE USSR-SBORNIK, 1986, 130 (3-4): : 389 - 396
- [3] On the asymptotics of spectrum of an even-order differential operator with a delta-function potential VESTNIK SAMARSKOGO GOSUDARSTVENNOGO TEKHNICHESKOGO UNIVERSITETA-SERIYA-FIZIKO-MATEMATICHESKIYE NAUKI, 2021, 25 (04): : 634 - 662
- [4] Delta-function potential with a complex coupling JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 2006, 39 (43): : 13495 - 13506
- [5] AMBIGUITIES WITH THE RELATIVISTIC DELTA-FUNCTION POTENTIAL PHYSICAL REVIEW A, 1981, 24 (03): : 1194 - 1197