Projects per year
Personal profile
Personal profile
Paul-Henry Leemann is currently an Assistant Professor in Department of Pure Mathematics of Xi’an Jiaotong-Liverpool University. He graduated from PhD at University of Geneva in 2016. Prior to joining XJTLU in September 2022, he worked as a postdoc at ENS Lyon (2016-2020) and as a Scientific collaborator at University of Neuchâtel (2020-2022). Dr Leemanns research interests lie in the intersection of geometric and combinatorial group theory, graph theory and symbolic dynamic. He is particularly interested in groups acting on rooted trees and their (weakly) maximal subgroups, limits and coverings of (Schreier) graphs, rigidity phenomenon in Cayley and Schreier graphs and graphs associated to dynamical systems.www.leemann.website
Research interests
Geometric Group Theory
Graph Theory
Symbolic Dynamic
Experience
Aug. 2022-Present, Assistant Professor, Department of Pure Mathematics, Xian Jiaotong-Liverpool University, China
2021-2022, Scientific Collaborator, Institut of Mathematics, University of Neuchâtel, Switzerland
2020-2021, Postdoctoral Researcher, Institut of mathematics, University of Neuchâtel, Switzerland
2016-2020, Postdoctoral Researcher, Department of Pure and Applied Mathematics, ENS Lyon, France
Awards and honours
2016 Vacheron Constantin prize for the best thesis in mathematics, University of Geneva, Switzerland
Education/Academic qualification
Basic Certificate of Didactic in Mathematics and in Educational Science, University of Geneva (Switzerland) - 2014
Ph.D., University of Geneva (Switzerland) - 2016
Person Types
- Staff
Fingerprint
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Collaborations and top research areas from the last five years
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Projects
- 2 Active
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RDF-23-01-045: Groups acting on rooted trees and their subgroups
1/01/24 → 31/12/26
Project: Internal Research Project
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Groups acting on rooted trees and their subgroups
1/01/24 → 31/12/26
Project: Internal Research Project
Research output
- 10 Article
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Wreath products of groups acting with bounded orbits
Leemann, P-H., 12 Mar 2024, In: Enseignement mathématiques. 70, 1/2, p. 121-149Research output: Contribution to journal › Article › peer-review
Open Access -
Cayley graphs with few automorphisms: the case of infinite groups
Leemann, P-H. & de la Salle, M., 2022, In: Annales Henri Lebesgue. 5, p. 73-92Research output: Contribution to journal › Article › peer-review
Open Access -
Most Rigid Representation and Cayley Index of Finitely Generated Groups
Leemann, P-H. & de la Salle, M., 2022, In: Electronic Journal of Combinatorics. 29, 4, 9 p.Research output: Contribution to journal › Article › peer-review
Open Access -
Property FW and wreath products of groups: A simple approach using Schreier graphs
Leemann, P-H. & Schneeberger, G., Dec 2022, In: Expositiones Mathematicae. 40, 4, p. 1261-1270 10 p.Research output: Contribution to journal › Article › peer-review
Open Access1 Citation (Scopus) -
Up to a double cover, every regular connected graph is isomorphic to a Schreier graph
Leemann, P-H., Mar 2022, In: Bulletin of the Belgian Mathematical Society - Simon Stevin. 28, 3, p. 373-379Research output: Contribution to journal › Article › peer-review
Activities
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2024 Shanghai Geometric Group Theory Workshop
Paul-Henry Leemann (Participant)
8 Jul 2024 → 12 Jul 2024Activity: Participating in or organising an event › Participating in an event e.g. a conference, workshop, …
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Nouveaux exemples de groupes séparables par les sous-groupes (LERF)
Paul-Henry Leemann (Speaker)
25 Jun 2024Activity: Talk or presentation › Presentation at conference/workshop/seminar
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Rigidity of Cayley graphs
Paul-Henry Leemann (Speaker)
10 Nov 2023Activity: Talk or presentation › Presentation at conference/workshop/seminar
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Random walks on infinite groups: some applications
Paul-Henry Leemann (Speaker)
16 Oct 2023Activity: Talk or presentation › Presentation at conference/workshop/seminar
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Self-similarity in groups, trees and fractals
Paul-Henry Leemann (Organiser)
30 May 2022 → 3 Jun 2022Activity: Participating in or organising an event › Organising an event e.g. a conference, workshop, …