Abstract:We show that all values in the interval
$[0,{\pi }/{2}]$
can be attained as interior angles between intermediate subalgebras (as introduced by Bakshi and the first named author [‘Lattice of intermediate subalgebras’, J. Lond. Math. Soc. (2)104(2) (2021), 2082–2127]) of a certain inclusion of simple unital
$C^*$
-algebras. We also calculate the interior angles between intermediate crossed product subalgebras of any inclusion of crossed product algebras … Show more
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