共 7 条
[2]
ON SPECTRUM OF ORDINARY 2ND ORDER DIFFERENTIAL OPERATORS
[J].
PROCEEDINGS OF THE ROYAL SOCIETY OF EDINBURG SECTION A-MATHEMATICAL AND PHYSICAL SCIENCES,
1969, 68
:95-&
[4]
EVERITT WN, TO BE PUBLISHED
[6]
NAIMARK MA, 1954, LINEAR DIFFERENTIAL
[7]
Titchmarsh E., 1962, Eigenfunction Expansions Associated with Second-order Differential Equations