Math Seminar
Math Seminars by Dr. Genki Ouchi and Dr. Kenta Sato
September 24 at 16:00 - 18:10, 2020
Dr. Genki Ouchi
(Special Postdoctoral Researcher, iTHEMS)
Dr. Kenta Sato
(Special Postdoctoral Researcher, iTHEMS)
[Talk 1] (16:00 - 17:00) Dr. Genki Ouchi Automorphism groups of cubic fourfolds and K3 categories In this talk, I would like to talk about symmetries of algebraic varieties, especially cubic fou...more
Venue: via Zoom
Event Official Language: English
Maximal Regularity and Partial Differential Equations.
September 8 at 16:00 - 18:10, 2020
Dr. Ken Furukawa (Special Researcher, Prediction Science Laboratory, RIKEN)
The theory of maximal regularity is a powerful tool to get solutions having the best regularity to linear partial differential equations (PDEs) of parabolic type. The theory is also applicable to show...more
Venue: via Zoom
Event Official Language: English
Stability of ferromagnetism in many-electron systems
July 31 at 16:00 - 18:10, 2020
Prof. Tadahiro Miyao (Associate Professor, Department of Mathematics, Faculty of Science, Hokkaido University)
First part Title: Stability of ferromagnetism in many-electron systems Abstract: I construct a model-independent framework describing stabilities of ferromagnetism in strongly correlated electron...more
Venue: via Zoom
Event Official Language: English
Topological data analysis from a practical and mathematical perspective
July 15 at 16:00 - 18:10, 2020
Dr. Yuichi Ike (Researcher, Artificial Intelligence, FUJITSU LABORATORIES LTD.)
1. Topological data analysis and its applications In this talk, I will explain some methods in topological data analysis (TDA) and their applications. First I recall persistent homology, which is a ...more
Venue: via Zoom
Event Official Language: English
Universal Error Bound for Constrained Quantum Dynamics
June 24 at 16:00 - 18:10, 2020
Dr. Ryusuke Hamazaki (Senior Research Scientist, iTHEMS)
In quantum mechanics, the existence of large energy gaps allows us to trace out the degrees of freedom of irrelevant energy scale. Consequently, we can treat a system within a constrained subspace obt...more
Venue: via Zoom
Event Official Language: English
Information geometry of operator scaling
June 17 at 16:00 - 18:10, 2020
Dr. Tasuku Soma (Research Associate, Graduate School of Information Science and Technology, The University of Tokyo)
Matrix scaling is a classical problem with a wide range of applications. It is known that the Sinkhorn algorithm for matrix scaling is interpreted as alternating e-projections from the viewpoint of cl...more
Venue: via Zoom
Event Official Language: English
Knotted 2-spheres in the 4-space and Yang-Mills gauge theory
May 27 at 16:00 - 18:10, 2020
Dr. Masaki Taniguchi (Special Postdoctoral Researcher, iTHEMS)
The classification problem of knots is one of the central topics in a study of topology. In the first part, we review classical knot theory and theory of 2-dimensional knots in the 4-dimensional space...more
Venue: via Zoom
Event Official Language: English
How many electrons can atoms bind?
May 13 at 16:00 - 18:10, 2020
Dr. Yukimi Goto (Special Postdoctoral Researcher, iTHEMS)
In this talk, I will introduce the mathematical studies on the ionization problem. Some experimental & numerical evidences say that any doubly charged atomic ion X^{2-} is not stable. This 'fact' is c...more
Venue: via Zoom
Event Official Language: English
From Eigenvalues to Resonances
May 1 at 16:00 - 18:10, 2020
Dr. Keita Mikami (Research Scientist, iTHEMS)
Resonance is one of the most studied object in mathematical study of Schrödinger operators. One possible reason is that resonance is appeared in many other fields like arithmetic, physics, and topogra...more
Venue: via zoom
Event Official Language: English
Index of the Wilson-Dirac operator revisited: a discrete version of Dirac operator on a finite lattice
February 25 at 16:00 - 18:10, 2020
Dr. Mikio Furuta (Professor, The University of Tokyo)
Venue: Seminar Room #160
Event Official Language: English
Solved and open problems regarding the neighborhood grid data structure
February 7 at 16:00 - 18:10, 2020
Dr. Martin Skrodzki (Visiting Researcher, iTHEMS)
February 7 at 16:00-17:00 17:10-18:10, 2020
Venue: Seminar Room #160
Event Official Language: English
Semiclassical methods in mathematical quantum mechanics
January 23 at 16:00 - 18:10, 2020
Dr. Shu Nakamura (Professor, Gakushuin University)
Plan of the seminar: we separate each talk into two. In the first 60 minutes the speaker gives an introductory talk for non-mathematicians. After a short break, the second 60 minutes is spent for a b...more
Venue: #435-437, Main Research Building
Event Official Language: English
Multiple Zeta Values: Interrelation of Series and Integrals
December 17 at 16:00 - 18:10, 2019
Prof. Syuji Yamamoto (Associate Professor, Keio University)
Plan of the seminar: we separate each talk into two. In the first 60 minutes the speaker gives an introductory talk for non-mathematicians. After a short break, the second 60 minutes is spent for a b...more
Venue: Seminar Room #160
Event Official Language: English
Noncommutative crepant resolutions and some higher dimensional flops
December 4 at 16:00 - 18:10, 2019
Dr. Wahei Hara (JSPS Research Fellow, School of Science and Engineering, Waseda University)
Plan of the seminar: we separate each talk into two. In the first 60 minutes the speaker gives an introductory talk for non-mathematicians. After a short break, the second 60 minutes is spent for a b...more
Venue: Seminar Room #160
Event Official Language: English
Some topics in projective geometry of algebraic varieties
November 8 at 16:00 - 18:10, 2019
Dr. Atsushi Ito (Assistant Professor, Nagoya University)
Plan of the seminar: we separate each talk into two. In the first 60 minutes the speaker gives an introductory talk for non-mathematicians. After a short break, the second 60 minutes is spent for a b...more
Venue: Seminar Room #160
Event Official Language: English
Atiyah-Hirzebruch spectral sequence in the band theory
October 24 at 16:00 - 18:10, 2019
Dr. Ken Shiozaki (Yukawa Institute for Theoretical Physics, Kyoto University)
Plan of the seminar: we separate each talk into two. In the first 60 minutes the speaker gives an introductory talk for non-mathematicians. After a short break, the second 60 minutes is spent for a b...more
Venue: Seminar Room #160
Event Official Language: English
Mean dimension of dynamical systems and information theory
October 21 - 23, 2019
Dr. Masaki Tsukamoto (Professor, Kyushu University)
Oct.21 15:30-16:30, 16:40-17:40, Okochi Hall Oct.22 13:30-14:30, room #435-437, Main Research Building Oct.23 13:30-14:30, room #435-437, Main Research Building
Venue: Okochi Hall / #435-437, Main Research Building
Event Official Language: English
Complex analysis on a neighborhood of a complex submanifold and its applications
July 30 at 16:00 - 18:10, 2019
Dr. Takayuki Koike (Lecturer, Department of Mathematics, Graduate School of Science, Osaka City University)
Plan of the seminar: we separate each talk into two. In the first 60 minutes the speaker gives an introductory talk for non-mathematicians. After a short break, the second 60 minutes is spent for a b...more
Venue: Seminar Room #160
Event Official Language: English
Introduction to Schroedinger Operators
July 12 at 16:00 - 18:10, 2019
Dr. Keita Mikami (Research Scientist, iTHEMS)
Plan of the seminar: we separate each talk into two. In the first 60 minutes the speaker gives an introductory talk for non-mathematicians. After a short break, the second 60 minutes is spent for a b...more
Venue: Seminar Room #160
Event Official Language: English
Asymmetric metric and coarse geometry
June 20 at 16:00 - 18:10, 2019
Dr. Hiroki Kodama (Visiting Scientist (Academia), iTHEMS)
Plan of the seminar: we separate each talk into two. In the first 60 minutes the speaker gives an introductory talk for non-mathematicians. After a short break, the second 60 minutes is spent for a b...more
Venue: Seminar Room #160
Event Official Language: English