The hyperfinite II₁-factor is Ulam stable in the trace norm on the unit ball, via a dimension-free matrix algebra result, implying isolation under approximate *-isomorphisms.
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The hyperfinite II$_1$-factor is Ulam stable
The hyperfinite II₁-factor is Ulam stable in the trace norm on the unit ball, via a dimension-free matrix algebra result, implying isolation under approximate *-isomorphisms.