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math.OA2009
Uniform approximation by elementary operators
Bojan Magajna
On a separable C*-algebra A every (completely) bounded map, which preserves closed two sided ideals, can be approximated uniformly by elementary operators if and only if A is a fin…
math.OA2009
Pointwise approximation by elementary complete contractions
Bojan Magajna
A complete contraction on a C*-algebra A, which preserves all closed two sided ideals J, can be approximated pointwise by elementary complete contractions if and only if the induce…