[Date]:2026/09/07～2026/09/11

Mathematical sciences and applications of expander graphs 2｜2026a024

Overview

• How to hold: Hybrid Meeting (In-person/Zoom)
• Venue:   IMI Auditorium (W1-D-413), West Zone 1, Ito campus, Kyushu University
• Main language: Japanese
• Type/Category: Grant for Young Researchers and Students-Short-term Joint Research
• Title of Research Project: Mathematical sciences and applications of expander graphs 2
• Principal Investigator: Shohei Satake（Department of Applied Mathematics, Faculty of Science, Fukuoka University / Associate Professor）
• Research Period: September 7, 2026.- September 11, 2026.
• Open to the Public: September 7, 2026.- September 10, 2026.
• Details of the Research Plan: https://joint1.imi.kyushu-u.ac.jp/en_research_chooses/view/2026a024

Program

September 7, 2026.　

13:50–14:00

Opening remarks

14:00–15:00

Junichiro Matsuda (Seoul National University, Korea)
On the Alon-Boppana bound for quantum graphs

15:30–16:30

Ryutaro Misawa (Tohoku University)
Quantum Graphs over Finite Quantum Spaces: Independent Sets, the Lovász Theta Number,
and Shannon Capacity

September 8, 2026.　

11:00–12:00

Yoshinori Yamasaki (Ehime University)
On properties of Schreier graphs for quadratic hypersurfaces over finite fields

14:00–15:00

Yasuaki Gyoda (Nagoya University)
Title: Markov–Lagrange Constants Associated with Generalized Markov Numbers

15:30–16:30

Arnaud Sipasseuth (The University of Tokyo)
Title: Group Action Signatures: Foundations and Graph-Theoretic Opportunities

September 9, 2026.　

11:00–12:00

Yuta Nozaki (Hokkaido University)
Title: Mathematics behind combinatorial reconfiguration

14:00–15:00

Taisuke Izumi (Osaka University)
Title: Expander Graphs and Distributed Computing

15:30–16:30

Hayato Saigo (ZEN University)
Title: Noncommutative Probability on Categories — From Foundation to Quantum Fields

18:00–20:00

懇親会（会場：未定・詳細は後日ご案内いたします）

September 10, 2026.　

11:00–12:00

Semin Oh (Kyungpook National University, Korea)
Title: Domination and independent domination in Johnson graphs J(n,3)

14:00–15:00

JuAe Song (Kyushu University)
Title: Geometry from Rational Function Semifields: Focusing on Abstract Tropical Curves with
Parallel Rays

15:30–16:30

Naoki Matsumoto (University of the Ryukyus)
Title: Game edge-connectivity of cubic graphs

16:30–16:40

Closing remarks

September 11, 2026.　 【Close】11:00-16:30

Abstract

Abstract:https://joint.imi.kyushu-u.ac.jp/wp-content/uploads/2026/08/c343609a42e9e2e8d133352c41d2fc48.pdf

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