Graduate School of Science Department of Mathematics 

Associate Professor  2026.04 - Now

School of Science Department of Mathematics 

Associate Professor  2026.04 - Now

博士（情報科学） （ Tohoku University ）

Natural Science / Geometry  / Complex hyperbolic geometry

日本数学会

Osaka Metropolitan University

2026.04 - Now

Yamaguchi University   Graduate School of Sciences and Technology for Innovation

2021.03 - 2026.03

On the sub-Riemannian geometry of the quaternionic Heisenberg group

Joonhyung Kim, Ioannis D. Platis, Li-Jie Sun

arxiv:2601.11312   2026.01

PCR Kahler equivalent metrics in the Siegel domain Reviewed

Joonhyung Kim, Ioannis D. Platis, Li-Jie Sun

To appear in Glasgow Math. Journal   2025

Half plane geometries: zero and unbounded negative curvature Reviewed

Ioannis D. Platis, Li-Jie Sun

Complex Geometric Analysis. Springer, Singapore   161 - 170   2025

Geodesics on the Kahler cone of the Heisenberg group Reviewed

Joonhyung Kim, Ioannis D. Platis, Li-Jie Sun

Korean J. Math.   30   783 - 790   2024

Geometric dynamics and the deformation spaces of complex hyperbolic Kleinian groups

Grant-in-Aid for Early-Career Scientists  2028

Geometric dynamics and the deformation spaces of complex hyperbolic Kleinian groups

Grant-in-Aid for Early-Career Scientists  2027

Geometric dynamics and the deformation spaces of complex hyperbolic Kleinian groups

Grant-in-Aid for Early-Career Scientists  2026

数学特別研究1A

2026   Intensive lecture   Graduate school

数学卒業研究A

2026   Intensive lecture   Undergraduate

常微分方程式

2026   Weekly class   Undergraduate

数学特別研究5A

2026   Intensive lecture   Graduate school

数学特別研究4A

2026   Intensive lecture   Graduate school