The forcing-axiom rigidity conjecture for C*-algebra coronas

Let AA and BB be separable non-unital C\mathrm{C}^*-algebras. Write Q(A)\mathcal Q(A) and Q(B)\mathcal Q(B) for their coronas, and call an isomorphism topologically trivial when it has a Borel lifting in the sense defined immediately before the claim.

Corona rigidity conjecture. CH implies that there are automorphisms of Q(A)\mathcal Q(A) that are not topologically trivial. Forcing Axioms imply that all isomorphisms between Q(A)\mathcal Q(A) and Q(B)\mathcal Q(B) are topologically trivial.

The text identifies this as the C*-algebra instance of the meta-conjecture and attributes it to the cited work; no resolution is supplied here.

Sources & referencesView supporting material

Primary source

Ilijas Farah, Saeed Ghasemi, Andrea Vaccaro and Alessandro Vignati, “Corona Rigidity”, arXiv:2201.11618 (2025).

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