Pieter Spaas

activity

20182020

most citedII

_{1}

factors with exotic central sequence algebras

2 citations · 3 across the 2 of their papers we have counts for

collaborators

3 papers

math.OA2020★ 1 cited

Cohomological obstructions to lifting properties for full group C $^{*}$ -algebras

Adrian Ioana, Pieter Spaas, Matthew Wiersma

We develop a new method, based on non-vanishing of second cohomology groups, for proving the failure of lifting properties for full C $^{*}$ -algebras of countable groups with (relativ…

math.OA2019★ 2 cited

II $_{1}$ factors with exotic central sequence algebras

Adrian Ioana, Pieter Spaas

We provide a class of separable II $_{1}$ factors $M$ whose central sequence algebra is not the "tail" algebra associated to any decreasing sequence of von Neumann subalgebras of $M$ .…

math.OA2018

A class of II $_{1}$ factors with a unique McDuff decomposition

Adrian Ioana, Pieter Spaas

We provide a fairly large class of II $_{1}$ factors $N$ such that $M = N \otimes ˉ R$ has a unique McDuff decomposition, up to isomorphism, where $R$ denotes the hyperfinite II $_{1}$ f…

Cohomological obstructions to lifting properties for full group C∗-algebras

II1​ factors with exotic central sequence algebras

A class of II1​ factors with a unique McDuff decomposition

Cohomological obstructions to lifting properties for full group C $^{*}$ -algebras

II $_{1}$ factors with exotic central sequence algebras

A class of II $_{1}$ factors with a unique McDuff decomposition