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Derivation length and automorphism length of unital C*-algebras
This paper is a contribution to the study of the ordinal-valued invariants of derivation and automorphism length. Akemann--Pedersen and Elliott proved that a separable unital C*-algebra has derivation length $0$ if and only if it has automorphism length at most $1/2$ if and only if it is a finite di
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