Department of Mathematical Sciences, Ritsumeikan University Web Page

News&Events

Math-Fi seminar on 25 Apr.

2019.04.22 Mon up

Date: 25 Apr. (Thu.)
Place: W.W. 6th-floor, Colloquium Room
Time: 16:30-18:00
Speaker: Tomooki Yuasa (Ritsumeikan University)
Title: Introduction to parametrix method

Workshop [April 4, 2019]

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

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)

Operator Theory Seminar [Jan. 21 & 23, 2019]

2019.01.16 Wed up

Lecturer: Marcin Marciniak (University of Gdansk, Poland)

Title: Introduction to Quantum Information Theory

Abstract:

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.

Date: 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

Date: 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.

Location: West Wing 6F Colloquium Room (BKC campus)

Access: http://en.ritsumei.ac.jp/file.jsp?id=246771&f=.pdf