Papers

  1. Adam Dor-On, Søren Eilers and Shirly Geffen. Classification of irreversible and reversible Pimsner operator algebras. Compositio Mathematica, Vol. 156, no. 12, 2510–2535, 2020. Journal, arXiv.

    2. Shirly Geffen. Nuclear dimension of crossed products associated to partial dynamical systems. Journal of Functional Analysis, Vol. 281, no. 2, 2021. Journal,arXiv.

    3. Fernando Abadie, Eusebio Gardella and Shirly Geffen. Decomposable partial actions. Journal of Functional Analysis, Vol. 281, no. 7, 2021. Journal, arXiv.

    4. Fernando Abadie, Eusebio Gardella and Shirly Geffen. Partial C*-dynamics and Rokhlin dimension. Ergodic Theory and Dynamical Systems, Vol. 42, no. 10, 2991–3024, 2022. Journal, arXiv.

    5. Eusebio Gardella, Shirly Geffen, Julian Kranz and Petr Naryshkin. Classifiability of crossed products by nonamenable groups. Journal für die reine und angewandte Mathematik (Crelle), Vol. 797, 285–312, 2023. Journal, arXiv.

    6. Eusebio Gardella, Shirly Geffen, Petr Naryshkin and Andrea Vaccaro. Dynamical comparison and Z-stability for crossed products of simple C*-algebras. Advances in Mathematics, Vol. 438, 2024. Journal, arXiv.

    7. Eusebio Gardella, Shirly Geffen, Julian Kranz, Petr Naryshkin and Andrea Vaccaro. Tracially amenable actions and purely infinite crossed products. Mathematische Annalen, Vol. 390, 3665–3690, 2024. Journal, arXiv.

    8. Shirly Geffen and Dan Ursu. Simplicity of crossed products by FC-hypercentral groups. Compositio Mathematica, Vol. 161, no. 9, 2272–2319, 2025. Journal, arXiv.

    9. Eusebio Gardella, Shirly Geffen, Rafaela Gesing, Grigoris Kopsacheilis and Petr Naryshkin. Essential freeness, allostery and Z-stability of crossed products. arXiv (2024).

    10. Shirly Geffen and Julian Kranz. Note on C*-algebras associated to boundary actions of hyperbolic 3-manifold groups. Münster Journal of Mathematics, Vol. 17, no. 1, 191–202, 2024. Journal, arXiv.

    11. Jamie Bell, Shirly Geffen and David Kerr. Stable rank one in nonnuclear crossed products. arxiv (2025).