On unitary convex decompositions of vectors in a -algebra
Akhlaq A. Siddiqui (2013)
Archivum Mathematicum
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By exploiting his recent results, the author further investigates the extent to which variation in the coefficients of a unitary convex decomposition of a vector in a unital -algebra permits the vector decomposable as convex combination of fewer unitaries; certain -algebra results due to M. Rørdam have been extended to the general setting of -algebras.