2 papers
math.OA2025
Paper-folding models for the CAR algebra
Grigoris Kopsacheilis, Wilhelm Winter
We show that the CAR algebra admits a Cantor spectrum C*-diagonal that is not conjugate to the standard AF diagonal. We obtain this by classification theory of C*-algebras, and the…
math.OA2025
Diagonal comparison of ample C*-diagonals
Grigoris Kopsacheilis, Wilhelm Winter
We introduce diagonal comparison, a regularity property of diagonal pairs where the sub-C*-algebra has totally disconnected spectrum, and establish its equivalence with the concurr…