This is a preview. Log in through your library . Abstract Let $A$ be a proper $H^\ast$-algebra and let $B$ be a Banach $^\ast$-algebra with an identity. A linear ...
Let J be a Jordan ring with involution * in which 2x = 0 implies x = 0 and in which 2J = J. Let the set S of symmetric elements of J be periodic and let N be the Jacobson radical of J. Then N2 = 0 and ...
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