blackadar problem 1even spheres 1homogeneous c*-algebras 1homomorphism obstructions 1k-theory 1matrix-valued functions 1
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math.OA2026
Obstructions to homomorphisms between homogeneous C*-algebras
Ilan Hirshberg, N. Christopher Phillips
The paper develops a method to detect new obstructions to the existence of homomorphisms between homogeneous C*-algebras with prescribed K‑theory behavior, and uses it to fully res…
math.OA2026
An isomorphism theorem for infinite reduced free products
Ilan Hirshberg, N. Christopher Phillips
Let C_1, C_2, ... be a sequence of separable unital C*-algebras, equipped with faithful tracial states and satisfying a mild condition. Let A be a unital direct limit of one dimens…