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math.LO2012
Homeomorphisms of Cech-Stone remainders: the zero-dimensional case
Ilijas Farah, Paul McKenney
We prove, using a weakening of the Proper Forcing Axiom, that any homemomorphism between Cech--Stone remainders of any two locally compact, zero-dimensional Polish spaces is induce…
math.LO2012
Some Calkin algebras have outer automorphisms
Ilijas Farah, Paul McKenney, Ernest Schimmerling
We consider various quotients of the C*-algebra of bounded operators on a nonseparable Hilbert space, and prove in some cases that, consistently, there are many outer automorphisms…