00502nam a2200181Ia 4500082002000000100002200020245002900042260003400071300001400105490003900119500000500158690000600163700000500169952010200174964001700276921001000293999001700303  a515.72bF228.SA  aFaris, William G.  aSelf-adjoint operatorsb  aBerlinbSpringer-Verlagc1975  avi, 115p.  aLecture notes in Mathematicsv 433  a  a   a  00104070aISIbISId1998-09-21l0o515.72 F228.SApDP11488r2019-02-14 00:00:00w2019-02-14yBK  abcdefg  a12394  c12394d12394