文摘
Let X be a Banach space with a generalized basis. The Banach algebra of bounded linear operators on X is used to construct Banach spaces, and , of weak?/sup> continuous functions from the state space of a -algebra to . If the basis satisfies certain properties, we prove that the dual space of has a decomposition analogous to that of the dual space of . In terms of the notion of M-ideal introduced by Alfsen and Effros, the subspace is an M-ideal in the Banach space . For the cases of and , , we also prove an analogue of the result that for a trace class operator A and a bounded operator B on a Hilbert space.