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math.OA2025
Nuclear C*-algebras: 99 problems
Christopher Schafhauser, Aaron Tikuisis, Stuart White
We present a collection of questions related to the structure and classification of nuclear C*-algebras.
math.DS2025
Etale equivalence relations with certain prescribed torsion in their homology
Michael Francesco Ala, Hung-Chang Liao, Aaron Tikuisis
Given a non-cyclic simple dimension group D and a subgroup E of Q/Z, we produce a minimal étale equivalence relation R such that H_0(\R) is isomorphic to D \oplus E, where H_0(R) d…