most citedThe relative commutant of separable C*-algebras of real rank zero

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math.OA2008★ 2 cited

The relative commutant of separable C*-algebras of real rank zero

Ilijas Farah

We answer a question of E. Kirchberg (personal communication): does the relative commutant of a separable C*-algebra in its ultrapower depend on the choice of the ultrafilter?