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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 -algebras on chordal graphs. In particular, this shows that right-angled Artin…
math.OA2025
On compact extensions of tracial -dynamical systems
Asgar Jamneshan, Pieter Spaas
We establish several classification results for compact extensions of tracial -dynamical systems and for relatively independent joinings thereof for actions of arbitrary discr…
math.OA2024
Trace spaces of full free product -algebras
Adrian Ioana, Pieter Spaas, Itamar Vigdorovich
We study the space of traces associated with arbitrary full free products of unital, separable -algebras. We show that, unless certain basic obstructions (which we fully chara…