Alexander Rolle

Short biography

Starting in Oct. 2021 I am a TUM Global Postdoc Fellow at The Technical University of Munich working with Ulrich Bauer. From Sep. 2019 to Sep. 2021 I was a postdoc with Michael Kerber at TU Graz, Austria. In August 2019 I finished a PhD in Mathematics at The University of Western Ontario, supervised by Rick Jardine.

Research interests

My main research interests are in applied and computational topology, especially applications to statistics and data analysis.

Publications and preprints

Persistable: persistent and stable clustering, with Luis Scoccola (2023). Journal of Open Source Software. Available at JOSS.
Compression for 2-parameter persistent homology, with Michael Kerber and Ulderico Fugacci (2023). Comput. Geom. Available at ScienceDirect (open access) and arXiv.
The degree-Rips complexes of an annulus with outliers (2022). SoCG 2022. Available at DROPS and arXiv.
A unified view on the functorial nerve theorem and its variations, with Ulrich Bauer, Michael Kerber, and Fabian Roll (2022). arXiv.
Fast minimal presentations of bi-graded persistence modules, with Michael Kerber (2021). ALENEX 2021. Available at siam and arXiv.
Multi-parameter hierarchical clustering and beyond (extended abstract) (2020). Topological Data Analysis and Beyond Workshop at NeurIPS 2020. Available at OpenReview.
Stable and consistent density-based clustering, with Luis Scoccola (2020). arXiv.
Torsors over simplicial schemes (2019). PhD thesis. Available here.
Central extensions and the classifying spaces of projective linear groups (2018). arXiv.

Software

mpfree, with Michael Kerber. Bitbucket.
Fast software for computing minimal presentations of 2-parameter persistence modules.
Persistable, with Luis Scoccola. GitHub.
Density-based clustering software with extensive visualization features.

Recorded talks

Some of my talks are available on YouTube:

Homology inference for the degree-Rips bifiltration. AATRN's Vietoris-Rips seminar.
The degree-Rips complexes of an annulus with outliers (1:01:20 mark). SoCG 2022.
Stable and consistent density-based clustering. ATMCS/AATRN 2020.

Contact information

Postal address:
Department of Mathematics, Technical University of Munich
Boltzmannstraße 3, 85747 Garching b. München, Germany

Email address: alexander dot rolle at tum dot de