00000nam a2200000 a 4500 20251202164123.0 3540789289 515.724 BER Berberian, Sterling K. Lectures in functional analysis and operator theory Delhi Narosa 1979 vii, 345p., 22 cm. PB Graduate texts in mathematics v.15 Operator theory Eng 100 010 _ 3102 W 5630 LIBSC C 220 220 2 0 0 0 PU PU 1998-04-08 48.00 0 515.724 BER 3102 BK 0 0 0 0 PU PU 1998-04-08 0 515.724 BER 5630 BK