Pullback diagram of H*-algebras

Authors : Mahnaz KHANEHGIR, Maryam AMYARI, Marzieh Moradian KHIBARY

Pages : 318-324

Doi:10.3906/mat-1303-16

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Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :In this paper we obtain some properties for the pullback diagram of H*-algebras. More precisely, we prove that the commutative diagram of H*-algebras and morphisms A1 @>j1>> B1 @VVy1V @VVy2V A2 @>j2>> B2 is pullback and y1 is an injection if and only if y1 is a surjection, y2 is an injection, and \ker j1 \cap \ker y1 = \{0\}.
Keywords : H algebra, morphisms, pullback diagram, trace class