Hiroki Ishikura 石倉宙樹
I am a postdoctoral researcher at Research Institute for Mathematical Sciences, Kyoto University, Japan.
I received my PhD in 2026 from the University of Tokyo under the supervision of Yoshikata Kida. Thesis
Email: ishikura [at] kurims.kyoto-u.ac.jp
Research interest: measured group theory, geometric group theory and Borel combinatorics
Here is my CV.
Talks
2026
Planar Borel complexes and soficity, Kyoto Operator Algebra Seminar, Kyoto University, 26 Jun.
Unimodular random graphs and Borel combinatorics, Logic seminar / Geometry seminar, Tohoku University, 19 Jun.
Borel planar complexes and soficity, Operator Algebra Seminar, the University of Tokyo, 16 Jun.
2025
Stallings-Swan's theorem for Borel graphs, TMU geometry seminar, Tokyo Metropolitan University, 19 Dec.
Stallings-Swan's theorem for Borel graphs, Differential Topology Seminar, Kyoto University, 16 Dec.
Unimodular random graphs and soficity, 9th workshop on geometric group theory, Kagoshima University, 4 Dec.
Stallings-Swan's theorem for Borel graphs, Descriptive Dynamics and Combinatorics Seminar, McGill University, 21-22 Oct.
Stallings-Swan's theorem for Borel graphs, MSJ Autumn Meeting, Nagoya University, 18 Sep.
Stallings-Swan's theorem for Borel graphs, Tuesday Seminar on Topology, the University of Tokyo, 8 Jul.
2024
Tree decomposition of Borel graphs and a Stallings-Swan theorem, Workshop on Operator Theory and Operator Algebras, Nagoya University, 23 Nov.
Permutation stability of free metabelian groups, Stability learning group (online), Tel Aviv University, 25 Jul.
2023
Permutation stability of free metabelian groups, Recent Developments in Operator Algebras, Kyoto University, 11 Sep.
Permutation stability of free metabelian groups, Topological Studies around Riemann Surfaces, the University of Tokyo, 22 Aug.
Permutation stability of free metabelian groups, New Aspects of Teichmüller theory, the University of Tokyo, 14 Jul.
Permutation stability and invariant random subgroups, Kyoto Operator Algebra Seminar, Kyoto University, 16 May
2022
Permutation stability of finitely generated free metabelian groups, Operator Algebra Seminar, the University of Tokyo, 1 Nov.