00423nam a2200133Ia 4500 251030b |||||||| |||| 00| 0 eng d 515.72 F911.ST Friedrichs, K. O. 11262 Spectral theory of operators in Hilbert space / New York: Springer-Verlag, 1973 x, 244p. Applied Mathematical Sciences ; v. 9 11263 ddc BK 0 0 0 515_720000000000000_F911_ST 0 15134 ISI ISI 1998-09-21 0 515.72 F911.ST DP9288 2019-02-14 00:00:00 BK 0 0 0 515_720000000000000_F911_ST 0 GR 15135 ISI ISI 1998-09-21 0 515.72 F911.ST G1597 2019-02-14 00:00:00 BK 12445 12445