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math.OA2024
Products of C*-algebras that do not embed into the Calkin algebra
Damian Głodkowski, Piotr Koszmider
We consider the Calkin algebra , i.e., the quotient of the algebra of all bounded linear operators on the separable Hilbert space …
math.FA2024
On Subspaces of Indecomposable Banach Spaces
Piotr Koszmider, Zdeněk Silber
We address the following question: what is the class of Banach spaces isomorphic to subspaces of indecomposable Banach spaces? We show that this class includes all Banach spaces of…