References
-
Titchmarsh E. Ch., Razlozhenie po sobstvennym funktsiyam, svyazannye s differentsialnymi uravneniyami vtorogo poryadka, т. 1, Izd-vo inostrannoi literatury, M., 1960
-
Marchenko V. A., “Otsenka ostatochnogo chlena v asimptoticheskoi formule dlya spektralnoi funktsii operatora Shturma–Liuvillya”, Teoriya funktsii, funktsion. analiz i ikh pril., 56, 1991, 14–29
-
Egorov Yu. V., Kondratev V. A., “Ob otsenkakh pervogo sobstvennogo znacheniya v nekotorykh zadachakh Shturma–Liuvillya”, UMN, 51:3 (1996), 73–-144
-
Vinokurov V. A., Sadovnichii V. A., “O granitsakh izmeneniya sobstvennogo znacheniya pri izmenenii potentsiala”, Doklady Akademii nauk, 392:5 (2003), 592–597
|