Corollary 34.6.2.label Let $A$ be a unital $C^{*}$-algebra, then the following are equivalent:

  1. (1)

    $A$ is commutative.

  2. (2)

    $\Gamma_{A}$ is a *-isomorphism.

  3. (3)

    $\Gamma_{A}$ is injective.

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