THE EIGENVALUES OF DEL-2-MU + LAMBDA-MU 0 WHEN THE BOUNDARY CONDITIONS ARE GIVEN ON SEMI-INFINITE DOMAINS

[1] COURANT R, 1937, METHODEN MATH PHYSIK, V2, pCH7

[2] COURANT R, 1931, METHODEN MATH PHYSIK, V1, pCH6

[3] Spectral theory of semi-bound operators and use of the spectral analysis of differential operators. [J]. MATHEMATISCHE ANNALEN, 1934, 109 : 465 - 487

[4] Spectral theories of semi-restricted operators and its application in the spectral decomposition of differential operators. Second chapter. [J]. MATHEMATISCHE ANNALEN, 1934, 109 : 685 - 713

[5] On differential operators in Hilbert spaces [J]. AMERICAN JOURNAL OF MATHEMATICS, 1939, 61 : 523 - 544

[6] Friedrichs K. O., 1934, MATH ANN, V110, P777

[7] NOTE ON DIFFRACTION BY AN EDGE [J]. QUARTERLY JOURNAL OF MECHANICS AND APPLIED MATHEMATICS, 1950, 3 (04) : 420 - 434

[8] RELLICH F, 1943, JBER DTSCH MATH VERS, V53, P157

[9] Rellich F., 1948, STUDIES ESSAYS PRESE, P329

[10] Sommerfeld A., 1896, MATH ANN, V47, P317, DOI [10.1007/BF01447273, DOI 10.1007/BF01447273]

[1] COURANT R, 1937, METHODEN MATH PHYSIK, V2, pCH7

[2] COURANT R, 1931, METHODEN MATH PHYSIK, V1, pCH6

[3] Spectral theory of semi-bound operators and use of the spectral analysis of differential operators. [J]. MATHEMATISCHE ANNALEN, 1934, 109 : 465 - 487

[4] Spectral theories of semi-restricted operators and its application in the spectral decomposition of differential operators. Second chapter. [J]. MATHEMATISCHE ANNALEN, 1934, 109 : 685 - 713

[5] On differential operators in Hilbert spaces [J]. AMERICAN JOURNAL OF MATHEMATICS, 1939, 61 : 523 - 544

[6] Friedrichs K. O., 1934, MATH ANN, V110, P777

[7] NOTE ON DIFFRACTION BY AN EDGE [J]. QUARTERLY JOURNAL OF MECHANICS AND APPLIED MATHEMATICS, 1950, 3 (04) : 420 - 434

[8] RELLICH F, 1943, JBER DTSCH MATH VERS, V53, P157

[9] Rellich F., 1948, STUDIES ESSAYS PRESE, P329

[10] Sommerfeld A., 1896, MATH ANN, V47, P317, DOI [10.1007/BF01447273, DOI 10.1007/BF01447273]