Displaying similar documents to “The strong unicity constant for projections.”

Accretive approximation in C*-algebras

Reiner Berntzen (1996)

Studia Mathematica

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The problem of approximation by accretive elements in a unital C*-algebra suggested by P. R. Halmos is substantially solved. The key idea is the observation that accretive approximation can be regarded as a combination of positive and self-adjoint approximation. The approximation results are proved both in the C*-norm and in another, topologically equivalent norm.

The strong unicity constant and its applications

W. Odyniec, M. P. Prophet (2008)

Banach Center Publications

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In this report we discuss the applications of the strong unicity constant and highlight its use in the minimal projection problem.