The paper characterizes existence of amenable traces on C*-algebras via joint free numerical radius of unitaries/isometries/partial isometries and derives new obstructions to lifting properties.
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2026 1verdicts
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Amenable traces and the joint numerical radius
The paper characterizes existence of amenable traces on C*-algebras via joint free numerical radius of unitaries/isometries/partial isometries and derives new obstructions to lifting properties.