Pieter Spaas

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20172026

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factors with exotic central sequence algebras

2 citations · 4 across the 11 of their papers we have counts for

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math.OA2026

Hilbert--Schmidt stability for graph products

Pieter Spaas

In this short note we prove Hilbert--Schmidt stability for graph products of abelian groups and $C^{*}$ -algebras on chordal graphs. In particular, this shows that right-angled Artin…

math.LO2026

Spectral Theory for Borel PMP Graphs

Cecelia Higgins, Pieter Spaas, Alexander Tenenbaum

We initiate a systematic study of spectral theory for bounded-degree Borel pmp graphs. Specifically, we study spectral properties of the associated adjacency and Laplacian operator…