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Published online by Cambridge University Press: 20 November 2018
We prove that the pure state space is homogeneous under the action of the automorphism group (or the subgroup of asymptotically inner automorphisms) for all the separable simple ${{C}^{*}}$-algebras. The first result of this kind was shown by Powers for the
$\text{UHF}$ algbras some 30 years ago.