共 11 条
[1]
ARONSZAJN N, 1955, P S SPECTRAL THEORY, P179
[2]
COURANT R, 1953, METHODS MATHEMATICAL, V1, pCH5
[3]
FRIEDRICHS KO, 1927, MATH ANN, V98, P206
[6]
Kato T., 1953, MATH ANN, V126, P253
[9]
RAYLEIGH, 1954, THEORY SOUND, V1
[10]
Ritz W, 1909, ANN PHYS-BERLIN, V28, P737