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math.OA2025
On masas of the Calkin algebra generated by projections
Piotr Koszmider
Assuming the continuum hypothesis CH, we obtain complete -isomorphic classification of maximal abelian self-adjoint subalgebras (masas) of the Calkin algebra $\mathcal Q(\ell_2)…
math.FA2025
Almost disjoint families and some automorphic and injective properties of
Piotr Koszmider, Małgorzata Rojek
Answering questions of A. Avilés, F. Cabello Sánchez, J. Castillo, M. González and Y. Moreno we show that the following statements are independent of the usual axioms ZFC with arbi…