Products of C*-algebras that do not embed into the Calkin algebra

Damian Głodkowski, Piotr Koszmider

We consider the Calkin algebra $\mathcal{Q}({\ell }_2)$, i.e., the quotient of the algebra $\mathcal{B}({\ell }_2)$ of all bounded linear operators on the separable Hilbert space ${\ell }_2$…