Box-integrality and integer decomposition properties
Box-integrality is a property of some integer polyhedron to remain integer after a truncation with any integer box. Integer decomposition properties is the study of integer points in convex polyhedra and, more precisely, of how to find "minimal" generators of these integer points. I study integer decomposition properties of polyhedra satisfying box-integrality. For this subject, I use plenty of discrete geometry such as triangulation of polyhedron, box-total dual integrality, and a class of matrices that generalizes totally unimodular matrices: totally equimodular matrices.
Toric manifolds with small Picard number
This research focuses on toric manifolds, which correspond to complete nonsingular fans in the n-real space. In particular, we use the wedge operation on simplicial complexes to study toric manifolds with small Picard number, that is, whose associated fans have only slightly more rays than their dimension.
Set theoretic operads
The purpose of operads is to encode universally all the operations acting on any category of algebras.
I study operads on sets and how they behave with respect to different set theoretic operations with a specific focus on operads on simplicial complexes.
In fact, they appear in the theory of polyhedral products, which for instance helps building topological models for toric manifolds.
Toric wedge induction and toric lifting property for piecewise linear spheres with few vertices
joint work with Suyoung Choi and Hyeontae Jang (2025)
Journal of the London Mathematical Society
Vol. 112, no. 1, pages e70248
The characterization of (n−1)-spheres with n+4 vertices having maximal Buchstaber number
joint work with Suyoung Choi and Hyeontae Jang (2024)
Journal für die reine und angewandte Mathematik (Crelles Journal)
Vol. 2024, no. 811, 2024, pages 267-292
An algorithmic strategy for finding characteristic maps over wedged simplicial complexes
joint work with Suyoung Choi (2022)
Pacific Journal of Mathematics
Vol. 320-1, pages 13–43
Cohomological rigidity of the connected sum of three real projective spaces
joint work with Suyoung Choi (2022)
Proceedings of the Steklov Institute of Mathematics
Vol. 317, pages 178–188
Complete non-singular toric varieties with Picard number 4
joint work with Suyoung Choi and Hyeontae Jang (2025)
arXiv:2504.18134
Totally equimodular matrices: decomposition and triangulation
joint work with Patrick Chervet and Roland Grappe (2025)
arXiv:2504.05930
GPU Algorithm for Enumerating PL Spheres of Picard Number 4: Application to Toric Topology
joint work with Suyoung Choi and Hyeontae Jang (2024)
40th International Symposium on Computational Geometry (SoCG 2024).
Leibniz International Proceedings in Informatics (LIPIcs),
Volume 293, pp. 41:1-41:15