机译:OPERATOR EQUALITIES AND CHARACTERIZATIONS OF ORTHOGONALITY IN PRE-HILBERT C~?-MODULES
Department of Mathematics, Faculty of Science, Farhangian University, Tehran, Iran;
Department of Pure Mathematics, Center of Excellence in Analysis on Algebraic Structures (CEAAS), Ferdowsi University of Mashhad, P. O. Box 1159, Mashhad 91775, Iran;
Department of Mathematics and Computer Science, West University of Timisoara, RO-300223 Timisoara, Vasile Parvan Blvd no. 4, Romania;
Hilbert C~*-module; norm equality; Pythagoras orthogonality; Pythagoras identity;