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arxiv: 1405.2750 · v1 · pith:GMPKR4XQnew · submitted 2014-05-12 · 🧮 math.OA

Subalgebras of finite codimension in semiprojective C*-algebras

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keywords semiprojectivealgebraalgebrascodimensionfinitesubalgebrasfinite-dimensionalparticular
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We show that semiprojectivity of a C*-algebra is preserved when passing to C*-subalgebras of finite codimension. In particular, any pullback of two semiprojective C*-algebras over a finite-dimensional C*-algebra is again semiprojective.

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