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2019年9月1日(日)～7日(土)　ワークショップ

2019.04.05 Fri up
The Fifth Japan-China Geometry Conference 

Dates: September 1–September 7, 2019
Conference Venue: Ritsumeikan University,  Biwako-Kusatsu Campus (BKC), West-Wing
 
Organizers: 
 
Scientific Committee:
       Akito Futaki (Tsinghua University)
       Anmin Li (Sichuan University)
       Toshiki Mabuchi (Osaka University)
       Yoshihiro Ohnita (Osaka City University)
       Gang Tian (Peking University)
       Weiping Zhang (Chern Institute of Mathematics)
 
Organizing Committee:
       Qing-Ming Cheng (Fukuoka University)
       Qing Ding (Fudan University)
       Ryushi Goto (Osaka University)
       Ryoichi Kobayashi (Nagoya University)
       Haizhong Li (Tsinghua University)
       Jiayu Li (University of Science and Technology of China)
       Reiko Miyaoka (Tohoku University)
       Hitoshi Moriyoshi (Nagoya University)
       Takashi Shioya (Tohoku University)
       Zizhou Tang (Chern Institute of Mathematics)
       Changping Wang (Fujian Normal University)
 
Local Organizers:
       Hiroyuki Osaka (Ritsumeikan University)
       Toshikazu Natsume (Ritsumeikan University)
  
Invited Speakers:
       Daguang Chen (Tsinghua University)
　　Fuquan Fang (Capital Normal University)
       Atsushi Fujioka (Kansai University)
       Pengfei Guan (McGill University)
       Xiaoli Han (Tsinghua University)
       Shohei Honda (Tohoku University)
       Rongli Huang (Guangxi Normal University) 
       Masashi Ishida (Tohoku University)
       Xiaoshang Jin (Peking University)
       Haizhong Li (Tsinghua University)
       Toshiki Mabuchi (Osaka University)
       Shin-ichi Ohta  (Osaka University)
       Kaoru Ono (Kyoto University)
       Chao Qian (Beijing Institute of Technology)
       Li Sheng (Sichuan University)  
       Gang Tian (Peking University)
       Peng Wang  (Fujian Normal University)
       Yong Wei (University of Science and Technology of  China and Australian National University)
       Hongwei Xu (Zhejiang University)
       Takao Yamaguchi (Kyoto University)
       Xi Zhang (University of Science and Technology of China)
       
For information:
　　Q.-M. Cheng  (cheng@fukuoka-u.ac.jp) 
       R. Miyaoka (r-miyaok@m.tohoku.ac.jp)
       H. Moriyoshi (moriyosi@math.nagoya-u.ac.jp)

Supported by :
　　JSPS Grants (Q.-M. Cheng, R. Goto, R. Miyaoka, H. Moriyoshi, T. Shioya), and
　　Department of Mathematical Science, Ritsumeikan University

2019年4月4日(木)　ワークショップ

2019.04.01 Mon up
”One day workshop on stochastic analysis”
  • Date: 4 Apr. (Thu.)
  • Place: W.W. 6th-floor, Colloquium Room
  • Time: 13:00-18:20


   Schedule

  • Time: 13:00-13:40
  • Speaker: Seiichiro Kusuoka (Okayama University)
  • Title: Invariant measure and flow associated to the Phi4-quantum field model on the three-dimensional torus
​
  • Time: 13:45-14:25
  • Speaker: David Nualart (Kansas University)
  • Title: Breuer-Major theorem: tightness and rate of convergence
​
  • Time: 14:40-15:20
  • Speaker: Hiroshi Tsukada (Kyoto University)
  • Title: Pathwise uniqueness of SDEs driven by strictly stable processes
​
  • Time: 15:25-15:45
  • Speaker: Takuya Nakagawa (Ritsumeikan University)
  • Title: $L^{\beta}$ distance between two one-dimensional stochastic differential equations driven by a symmetric $\alpha$-stable process
​
  • Time: 16:00-16:40
  • Speaker: Lorick Huang (INSA de Toulouse)
  • Title: A Local Limit Theorem for Robbins-Monro Procedure
​
  • Time: 16:45-17:25
  • Speaker: Yu Ito (Kyoto Sangyo University)
  • Title: A fractional calculus approach to rough path integration
​
  • Time: 17:40-18:20
  • Speaker: Anthony Reveillac (INSA de Toulouse)
  • Title: On a stochastic Hardy-Littlewood-Sobolev inequality with application to Strichartz estimates for a noise dispersion

　Organizing Committee: Yuuki Ida (Ritsumeikan University) and Gô Yûki (Ritsumeikan University)
 

Math-Fi seminar on 11 Apr.

2019.03.27 Wed up
  • Date: 11 Apr. (Thu.)
  • Place: W.W. 6th-floor, Colloquium Room
  • Time: 16:30-18:00
  • Speaker: David Nualart (Universitat de Barcelona & Kansas University)
  • Title: Stein’s method for normal approximations

Math-Fi seminar on 28 Mar.

2019.03.27 Wed up
  • Date: 28 Mar. (Thu.)
  • Place: W.W. 6th-floor, Colloquium Room
  • Time: 16:30-18:00
  • Speaker: David Nualart (Universitat de Barcelona & Kansas University)
  • Title: A brief introduction to Malliavin calculus

2019年3月29日（金）立命館大学幾何学セミナー

2019.03.15 Fri up
<<立命館大学幾何学セミナー>>

日時：        2019年3月29日（金） 16:00～17:30

タイトル：   Recursion operatorとSymplectic-Haantjes多様体の構成による可積分系へのアプローチ

講演者：    竹内 司 （東京理科大学）

アブストラクト：
これまで，可積分系の特徴付けとして，Liouville-Arnoldの定理やLax pairなどといった多くの定理や理論が知られてきた．本講演では，これらと異なる可積分系の特徴付けとして，次の２つについて紹介したい．１つはrecursion operatorと呼ばれるテンソル場の構成による特徴付けである．旧来は物理現象を主な対象としてこのテンソル場の構成が考えられていたが，リーマン多様体の測地流に対してrecursion operatorの構成を行い対応するハミルトン関数の可積分系性を示すことにより数学的なモデルについても考察が可能であることを示していく．また，応用として，可換なハミルトンベクトル場の列を構成する．もう１つはP. TempestaとG. Tondoにより最近導入された，Haantjesテンソルを用いたsymplectic-Haantjes多様体とLenard-Haantjes chainについて紹介したい．彼らは，非退化なハミルトン系が完全積分可能であるためにはsymplectic-Haantjes多様体の存在が必要十分であることが示した．また，可積分系が与えられたとき，その包合的な第１積分とLenard-Haantjes chainによりsymplectic-Haantjes多様体を構成する問題を考察し，これを逆問題と呼んだ．この逆問題については，未だ多くの例は知られていないが，具体的な複数の２自由度のハミルトン系について結果を得たため，これを紹介する．

場所：         立命館大学びわこ・くさつキャンパス（BKC）
　　　           ウェストウィング6階談話会室

Math-Fi seminar on 14 Mar.

2019.03.11 Mon up
  • Date: 14 Mar. (Thu.)
  • Place: W.W. 6th-floor, Colloquium Room
  • Time: 16:30-18:00
  • Speaker: Katsushi Nakajima (Ritsumeikan Asia Pacific University)
  • Title: Commodity Spot and Futures Prices under Supply, Demand, and Financial Trading
  • Reference: “https://papers.ssrn.com/sol3/papers.cfm?abstract_id=2603946“

Math-Fi seminar on 15 Feb.

2019.02.18 Mon up
  • Date: 15 Feb. (Fri.)
  • Place: W.W. 6th-floor, Colloquium Room
  • Time: 16:30-18:00
  • Speaker: Antoine Lejay (Institut Élie Cartan de Lorraine)
  • Title: Rough paths (the final lecture)

Math-Fi seminar on 14 Feb.

2019.02.18 Mon up
  • Date: 14 Feb. (Thu.)
  • Place: W.W. 6th-floor, Colloquium Room
  • Time: 16:30-18:30
​
  • ​First speaker: Antoine Lejay (Institut Élie Cartan de Lorraine)
  • Title: rough paths (the second lecture)
​
  • Second speaker: Takafumi Amaba (Fukuoka University)
  • Title: On the regularity of time occupation functionals for Gaussian processes
  • Abstract:
We are interested in the order of Sobolev space $\mathbb{D}_{2}^{\alpha}$ for which Wiener functional functional $ \int_{0}^{t} \Lambda ( X_{s}, \dot{X}_{s} ) \mathrm{d}s $ belongs to, where $\Lambda$ is a Schwartz distribution on $\mathbb{R}^{2}$ and $X = (X_{t})_{t \in \mathbb{R}}$ is a centered stationary Gaussian process satisfying some conditions. This class of functionals cover the cases of time-occupational functionals and level crossings. Joint work with Marie Kratz.
 

Math-Fi seminar on 12 Feb.

2019.02.18 Mon up
  • Date: 12 Feb. (Tue.)
  • Place: W.W. 6th-floor, Colloquium Room
  • Time: 16:30-18:00
  • Speaker: Antoine Lejay (Institut Élie Cartan de Lorraine)
  • Title: Rough paths (the first lecture)

立命館作用素論セミナー　2019年1月21日(月)・23日(水)

2019.01.16 Wed up
日時：2019年1月21日(月)・23日(水)　13:00–16:10
場所：立命館大学びわこ・くさつキャンパス（BKC）
　　　ウェストウィング6階談話会室
講演者：Marcin Marciniak (University of Gdansk, Poland)
タイトル：Introduction to Quantum Information Theory
アブストラクト：
Quantum Information Theory (QIT) is an exciting, young field which lies at the intersection of Mathematics, Physics and Computer Science. It emerged rapidly in last twenty years. QIT has sources in classical information theory but it seriously treats foundations of quantum theory also. 
Soon it turned out that some problems formulated in this theory are highly nontrivial. 
 
The aim of the series of talks is to present mathematics of QIT. Main mathematical tool come from linear algebra, functional analysis, operator algebra theory as well as probability theory. We will describe selected notions of QIT together with mathematics lying behind them.
 

Jan. 21, 2019
  13:00~14:30
Lecture 1. Foundations of Quantum Theory: States and measurements, quantum entanglement.
  14:40~16:10
Lecture 2. Entanglement witnesses: applications of positive maps
 
Jan. 23, 2019
  13:00~14:30
Lecture 3. Quantum correlations: Tsirelson’s problem and applications of operator systems theory.
  14:40~16:10
Lecture 4. Bell inequalities and steering inequalities: applications of operator space theory.
 
 
 

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