Geodesic
On commuting selfadjoint extensions of differential operators
Sbornik. Mathematics, Tome 13 (1971) no. 3, pp. 360-369 
R. Denchev. On commuting selfadjoint extensions of differential operators. Sbornik. Mathematics, Tome 13 (1971) no. 3, pp. 360-369. http://geodesic.mathdoc.fr/item/SM_1971_13_3_a2/
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Voir la notice de l'article provenant de la source Math-Net.Ru

We describe the domains in which the operators of the Dirichlet problem of two differential expressions spectrally commute. Bibliography: 7 titles.

[1] K. Mopen, Metody gilbertova prostranstva, Mir, Moskva, 1965 | MR

[2] F. R. Gantmakher, Teoriya matrits, Nauka, Moskva, 1967 | MR

[3] V. A. Kondratev, “Kraevye zadachi dlya ellipticheskikh uravnenii v oblastyakh s konicheskimi ili uglovymi tochkami”, Trudy Mosk. matem. ob-va, XVI (1967), 207–318

[4] M. Sh. Birman, G. K. Skvortsov, “O kvadratichnoi summiruemosti starshikh proizvodnykh resheniya zadachi Dirikhle v oblasti s kusochno-gladkoi granitsei”, Izv. VUZ'ov, Matematika, 1962, no. 5(30), 12–21 | MR | Zbl

[5] L. Bers, F. Dzhon, M. Shekhter, Uravneniya s chastnymi proizvodnymi, Mir, Moskva, 1966 | MR | Zbl

[6] E. Kamke, Spravochnik po differentsialnym uravneniyam v chastnykh proizvodnykh pervogo poryadka, Nauka, Moskva, 1966 | Zbl

[7] N. I. Akhiezer, I. M. Glazman, Teoriya lineinykh operatorov v gilbertovom prostranstve, Nauka, Moskva, 1966 | MR | Zbl