Geometry and Probability 2025

Date: June 24 morning (Tue) - June 26 noon (Thu), 2025

Venue: 2nd Floor, J:COM Horuto Hall Oita  J:COM ホルトホール大分 2階 (website) 

(Lecture room, Satellite campus Oita (24th and 26th),  Meeting room 201 (25th))

Address:  1-5-1 Kanaike-minami, Oita, Oita, 870-0839, Japan 

                    〒870-0839 大分県大分市金池南1-5-1  (map)

Confirmed speakers:

• Atsushi Atsuji 厚地 淳 (Keio)

• Tadashi Fujioka 藤岡 禎司 (Kyoto)

• Hiroshi Hirai 平井 広志 (Nagoya)

• Noboru Isobe 磯部 伸 (RIKEN)

• Jun Kitagawa 北川 潤 (Michigan State)

• Ludovico Marini (Fukuoka)

• Ayato Mitsuishi 三石 史人 (Fukuoka)

• Hiroki Nakajima中島 啓貴  (Ehime)

• Ikkei Shimizu 清水 一慶 (Kyoto)

• Sho Shimoyama 下山 翔 (Tokyo)

• Kouichi Taira 平良 晃一 (Kyushu)

Short communications

• Hikaru Kubota 久保田 景

Program：

PDF version of the program with abstract is here

June 24th (Tue) 

• 9:30-10:30 Tadashi Fujioka 藤岡 禎司 (Kyoto)

Busemann NPC 4-manifolds are Euclidean

• 10:50-11:50 Jun Kitagawa 北川 潤 (Michigan State)

Quantitative stability of optimal transport maps and potentials on Riemannian manifolds

• 13:40-14:40 Sho Shimoyama 下山 翔 (Tokyo)

Saddle point problem and gradient descent ascent flows in metric spaces

• 15:00-16:00 Noboru Isobe 磯部 伸 (RIKEN)

A Convergence Result of a Continuous Model of Deep Learning via Łojasiewicz–Simon Inequality

• 16:20-17:20 Hiroshi Hirai 平井 広志 (Nagoya)

Gradient descent for unbounded convex functions on Hadamard manifolds and its applications to scaling problems

June 25th (Wed) 

• 9:30-10:30 Ikkei Shimizu 清水 一慶 (Kyoto)

Global perturbation of isolated equivariant chiral skyrmions from the harmonic maps

• 10:50-11:50 Kouichi Taira 平良 晃一 (Kyushu)

Smoothness of the fundamental solution of Schrödinger equations on Riemannian manifolds

• 13:40-14:40 Hiroki Nakajima中島 啓貴  (Ehime)

Observable diameter of the symmetric groups

• 15:00-16:00 Ayato Mitsuishi 三石 史人 (Fukuoka)

Scaling problem for sequences of \ell_p-product of the line with Gaussian measure or other stable distributions

• 16:20-17:20 Short Communications

Hikaru Kubota 久保田 景 (Osaka)

Syota Esaki 江崎翔太 (Oita)

June 26th (Thu)

• 9:30-10:30 Ludovico Marini (Fukuoka)

Gradient estimates and Calder\'on-Zygmund inequalities under Ricci lower bounds

• 10:50-11:50 Atsushi Atsuji 厚地 淳 (Keio)

Some analogues of classical function theoretic objects on infinite graphs 

Event: 

A banquet will be held at 18:30 on June 24 (tue).  If you want to join us, please apply  via application form.

本研究会は

科学研究費補助金 基盤研究（S）課題番号22H04942 代表者：桑江一洋 

科学研究費補助金 基盤研究（B）課題番号24K00523 代表者：太田慎一

の援助を受けています．

Organizers

• Kazuhiro Kuwae 桑江 一洋 (Fukuoka) kuwae at fukuoka-u.ac.jp

• Takashi Shioya 塩谷 隆 (Tohoku) takashi.shioya.a2 at tohoku.ac.jp

• Shin-ichi Ohta 太田 慎一 (Osaka) s.ohta at math.sci.osaka-u.ac.jp

• Yohei Sakurai 櫻井 陽平 (Saitama) ysakurai at rimath.saitama-u.ac.jp

• Syota Esaki 江崎 翔太 (Oita) sesaki at oita-u.ac.jp

• Satoshi Ishiwata 石渡 聡 (Yamagata) ishiwata at sci.kj.yamagata-u.ac.jp