Advances in the Theory of Unitary Rank and Regular Approximation
- 1 July 1988
- journal article
- Published by JSTOR in Annals of Mathematics
- Vol. 128 (1) , 153
- https://doi.org/10.2307/1971465
Abstract
Let U be a C*-algebra and let T be an element in U. Let u(T) denote the least integer n such that T is a convex combination of n unitaries in U. Set u(T) = ∞ if...Keywords
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