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20142026
most citedGroup algebras acting on -spaces

34 citations · 176 across the 46 of their papers we have counts for

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math.OA2026

Classifiability of crossed products

Eusebio Gardella

This survey studies C*-algebraic crossed products arising from topological dynamical systems with an eye toward their classifiability in the sense of the Elliott program. We introd…

math.OA2025

Topological full groups, invertible isometries, and automorphisms of groupoid algebras

Eusebio Gardella, Mathias Palmstrøm, Hannes Thiel

We show that the topological full group of a Hausdorff ample groupoid with compact unit space coincides with the group of homotopy classes of invertible isometries in pseudofunctio…

math.OA2025

Rigidity of pseudofunction algebras of ample groupoids

Eusebio Gardella, Mathias Palmstrøm, Hannes Thiel

We show that a Hausdorff, ample groupoid can be completely recovered from the -norm completion of . More generally, we show that this is also the…

math.OA2025

Prime and semiprime Lie ideals in C*-algebras

Eusebio Gardella, Kan Kitamura, Hannes Thiel

Using the theory of Dixmier ideals developed in previous work, we show that every semiprime Lie ideal in a C*-algebra arises as the full normalizer subspace of a semiprime two-side…

math.OA2025

Simplicity of -algebras of contracting self-similar groups

Eusebio Gardella, Volodymyr Nekrashevych, Benjamin Steinberg +1

We show that the -algebra associated by Nekrashevych to a contracting self-similar group is simple if and only if the corresponding complex -algebra is simple. We also i…

math.OA2024

Essential freeness, allostery and -stability of crossed products

Eusebio Gardella, Shirly Geffen, Rafaela Gesing +2

We explore classifiability of crossed products of actions of countable amenable groups on compact, metrizable spaces. It is completely understood when such crossed products are sim…