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
PhD, On Subgroups and Schreier Graphs of Finitely Generated Groups, University of Geneva
1 Sept 2011 → 30 Aug 2016
Award Date: 30 Aug 2016
Basic Certificate of Didactic in Mathematics and in Educational Science
1 Sept 2013 → 26 Jun 2015
Award Date: 26 Jun 2015
Research areas
- Geometric Group Theory
- Graph Theory
- Symbolic Dynamic
Person Types
- Staff
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Collaborations and top research areas from the last five years
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Projects
- 1 Active
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Groups acting on rooted trees and their subgroups
Leemann, P.-H. (PI)
1/01/24 → 31/12/26
Project: Internal Research Project
Research output
- 13 Article
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On the structure of finitely generated subgroups of branch groups
Francoeur, D., Grigorchuk, R., Leemann, P.-H. & Nagnibeda, T., 14 May 2025, (E-pub ahead of print) In: Journal of Combinatorial Algebra.Research output: Contribution to journal › Article › peer-review
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Subgroup induction property for branch groups
Leemann, P. H. & Francoeur, D., 16 Jan 2025, In: Journal of Fractal Geometry. 12, 1-2, p. 175-207 33 p.Research output: Contribution to journal › Article › peer-review
Open Access2 Citations (Scopus) -
Weakly maximal subgroups of branch groups
Leemann, P. H., 30 May 2025, In: International Journal of Algebra and Computation. 35, 5, p. 587-646Research output: Contribution to journal › Article › peer-review
Open Access -
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., Sept 2022, In: Annales Henri Lebesgue. 5, p. 73-92Research output: Contribution to journal › Article › peer-review
Open Access1 Citation (Scopus)
Activities
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Mathematical Reviews (Journal)
Paul-Henry Leemann (Reviewer)
Aug 2025Activity: Peer-review and editorial work of publications › Publication Peer-review
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On the structure of finitely generated subgroups of branch groups
Leemann, P.-H. (Speaker)
10 Jul 2025Activity: Talk or presentation › Presentation at conference/workshop/seminar
File -
Mathematical Reviews (Journal)
Paul-Henry Leemann (Reviewer)
11 Jun 2025Activity: Peer-review and editorial work of publications › Publication Peer-review
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Journal of Computational Algebra (Journal)
Leemann, P.-H. (Reviewer)
Jun 2025Activity: Peer-review and editorial work of publications › Publication Peer-review
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Maximal subgroups, weakly maximal subgroups and generalization
Leemann, P.-H. (Speaker)
23 May 2025Activity: Talk or presentation › Presentation at conference/workshop/seminar