About me
I am a Postdoc in the differential geometry group at the Mathematical Institute of the University of Augsburg. Before, I was in the differential geometry group at the Institute for Algebra and Geometry of the KIT. I obtained my PhD in Münster under the supervision of Johannes Ebert.
Activities
IX. Bavarian Geometry and Topology Meeting
Together with Artiom Nepechiy, we organized the IX. Bavarian Geometry and Topology Meeting.
Research
My research interest lies in geometric topology and differential geometry. In particular I am interested in studying spaces of Riemannian metrics with curvature bounds like positive scalar curvature through topological methods.
Publications and Preprints

“Spaces of Positive Scalar Curvature metrics on totally nonspin Manifolds with spin boundary”, 2022.
arXiv: 2204.11512.
Video abstract: Spaces of Positive Scalar Curvature metrics on totally nonspin Manifolds with spin boundary
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“Sphericity of kappaclasses and positive curvature via block bundles”, 2021.
arXiv: 2109.10306.
(This article is a major upgrade to its previous version to be found here: arXiv:2104.10595. Video abstract: Diffeomorphisms and positive curvature)
: 
“Spaces of positive intermediate curvature metrics”
Geometriae Dedicata, 2021.
DOI: 10.1007/s1071102100635w
arXiv: 2011.11388
: 
“Spaces of metrics of positive Ricci curvature and bundles with nonmultiplicative Ahatgenus”
International Mathematics Research Notices, 2020.
DOI: 10.1093/imrn/rnaa361 (free access article link )
arXiv: 2010.04588
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“Cohomogeneity One Manifolds and Homogeneous Spaces of Positive Scalar Curvature”
Bulletin of the London Mathematical Society, 2022.
DOI: 10.1112/blms.12557
arXiv: 2009.13142
: 
“HSpace structures on spaces of metrics of positive scalar curvature”
Transactions of the American Mathematical Society, 2021.
DOI: 10.1090/tran/8505
arXiv: 2004.01033
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“The action of the mapping class group on metrics of positive scalar curvature”
Mathematische Annalen, 2021.
DOI: 10.1007/s00208021022351
arXiv: 1912.08613
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“The GromovLawsonChernysh surgery theorem”
Boletín de la Sociedad Matemática Mexicana, 2020.
DOI: 10.1007/s4059002100310w
arXiv: 1807.06311
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Theses
 PhDThesis: The action of the mapping class group on spaces of metrics of positive scalar curvature, 2019.
 Master's Thesis: On the GromovLawson surgery theorem, 2015.
Talks
 2021 Curvature and Global Shape, Universität Münster:
Diffeomorphisms and positive curvature.  2021 Workshop on Geometry, Analysis and Topology of positive scalar curvature, Mathematisches Forschungsinstitut Oberwolfach:
Diffeomorphisms and positive curvature.  2021 Topology/Geometry Zoom Seminar, University of Oregon:
Diffeomorphisms and positive curvature.  2021 Topology and Geometry seminar, University of Toronto:
Diffeomorphisms and positive curvature.  2020 Oberseminar Geometrie, LudwigMaximiliansuniversität München:
The action of Diff(M) on metrics of positive scalar curvature.  2020 Oberseminar AG Differentialgeometrie, KIT:
The space of positive Ricci curvature metrics.  2020 Oberseminar Global Analysis and Geometry, Universität Regensburg:
The space of positive Ricci curvature metrics.  2020 Geometry and Topology Seminar, Durham University:
The space of positive Ricci curvature metrics, available on Youtube.  2020 Topology/Geometry Zoom Seminar, University of Oregon:
The space of positive Ricci curvature metrics.  2020 Oberseminar Topologie, GeorgAugustUniversität Göttingen:
HSpace multiplications on metrics of positive scalar curvature.  2020 Spaces and moduli spaces of Riemannian metrics with curvature bounds  AFriKa:
HSpace multiplications on metrics of positive scalar curvature.  2019 Department of Mathematics & Statistics Colloquium, Maynooth University:
The action of Diff(M) on metrics of positive scalar curvature.  2019 Oberseminar Differentialgeometrie, Universität Augsburg:
The action of Diff(M) on metrics of positive scalar curvature.  2019 Oberseminar AG Differentialgeometrie, KIT:
The action of Diff(M) on metrics of positive scalar curvature.  2019 Oberseminar Topologie, GeorgAugustUniversität Göttingen:
The action of Diff(M) on metrics of positive scalar curvature.  2019 Research Seminar on Topology, University of Fribourg:
The action of Diff(M) on metrics of positive scalar curvature.  2018 Young Topologist's meeting:
Topology and Positive Scalar Curvature.  2016 Surgery and Geometry (16w2689):
Surgery and Positive Scalar Curvature.
Slides
CV
You may find my academic CV here.
Contact
You can contact me via math(at)frenck.net. ResearchGateMiscellanous
On my YouTube channel you may find occasional video abstracts, a playlist of my zoomtalks and (possibly) other stuff.
I occasionally do a bit of coding. Here's a whiteboardlike tool that can be used for online presentations or teaching using a reMarkable tablet. It's a modification of PipesandPaper.