00000nam a2200000 a 4500 20251203091009.0 512.55 DOU Douglas, Ronald G. Banach algebra techniques in operator theory New York Academic press 1972 xvi, 212p. 22 cm. HB. Pure and applied mathematics 49 Operator theory Algebra techniques Eng 100 010 _ 34639 LIBSC C 26238 26238 0 0 0 0 PU PU 1998-04-08 0 512.55 DOU 34639 BK