35 citations · 138 across the 26 of their papers we have counts for
Showing 2012Show all
2 papers · 1 filter
math.LO2012★ 4 cited
Borel Tukey morphisms and combinatorial cardinal invariants of the continuum
Samuel Coskey, Tamás Mátrai, Juris Steprāns
We discuss the Borel Tukey ordering on cardinal invariants of the continuum. We observe that this ordering makes sense for a larger class of cardinals than has previously been cons…
math.OA2012★ 22 cited
Automorphisms of corona algebras, and group cohomology
Samuel Coskey, Ilijas Farah
In 2007 Phillips and Weaver showed that, assuming the Continuum Hypothesis, there exists an outer automorphism of the Calkin algebra. (The Calkin algebra is the algebra of bounded…