Inductive limits of projective C*-algebras. - IMAR
Inductive limits of projective C*-algebras. - IMAR
Inductive limits of projective C*-algebras. - IMAR
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<strong>Inductive</strong> <strong>limits</strong> <strong>of</strong> <strong>projective</strong> C ∗ -<strong>algebras</strong> IV<br />
Corollary 3.6<br />
Every contractible C ∗ -algebra is an inductive limit <strong>of</strong> <strong>projective</strong><br />
C ∗ -<strong>algebras</strong>.<br />
Remark 3.7<br />
This is the non-commutative analogue <strong>of</strong> the following classical<br />
result: Every contractible space is an inverse limit <strong>of</strong> ARs.<br />
Example 3.8<br />
X := {0}×[−1, 1]∪{(x, sin(1/x)) ∈ R 2 | 0 < x ≤ 1/π}<br />
X0 := X \{(1/π, 0)}<br />
Then C0(X0) ∼ Sh 0, while C0(X0) ≃ 0.<br />
For every algebra A, C0(X0, A) is inductive limit <strong>of</strong> <strong>projective</strong>s.<br />
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