Approximate unitary equivalence of power partial isometries

Approximate unitary equivalence of power partial isometries
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by Kenneth R. Davidson PDF

Proc. Amer. Math. Soc. 91 (1984), 81-84 Request permission

Every power partial isometry (p.p.i.) in the Calkin algebra lifts to a p.p.i. in $B\left ( \mathcal {H} \right )$.

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