# Seminar

## Relations between fractal dimensions and arithmetic progressions

October 23 at 11:35 - 12:35, 2018

Mr. Kota Saito (Nagoya University)

In this talk we give estimates for the dimensions of sets in real numbers which uniformly avoid finite arithmetic progressions. More precisely, we say that $F$ uniformly avoids arithmetic progressions...more

Venue: Large Meeting Room, 2F Welfare and Conference Building (Cafeteria)

Event Official Language: English

## Generalized Erdös and Obláth theorem for polynomial-factorial Diophantine equations

October 23 at 10:30 - 11:30, 2018

Mr. Wataru Takeda (Nagoya University)

Diophantine equations are equations where only integer solutions are accepted. There are many types of Diophantine equations and many results are known. Our Diophantine equation is of the form x^n+y^n...more

Venue: Large Meeting Room, 2F Welfare and Conference Building (Cafeteria)

Event Official Language: English

## Non-Hermitian phase transition from a polariton Bose-Einstein condensate to a photon laser

September 28 at 13:30 - 17:00, 2018

Dr. Ryo Hanai (Osaka University)

Venue: Seminar Room #160

Event Official Language: Japanese

## Number Theory Seminar

July 24 at 10:00 - 12:35, 2018

Dr. Masataka Ono
(Keio University)

Dr. Shingo Sugiyama
(Nihon University)

Mr. Yoshinosuke Hirakawa
(Keio University)

This seminar is aimed at scientists in general, not only to mathematicians. 10:00-10:45 "Multiple zeta functions associated with 2-colored rooted trees" Masataka Ono 10:55-11:40 "Modular forms and...more

Venue: Seminar Room #160

Event Official Language: English

## Introduction to topological band structure

July 6 at 10:30 - 17:30, 2018

Dr. Tomoki Ozawa (Senior Research Scientist, iTHEMS)

Venue: Seminar Room #160

Event Official Language: Japanese

## Topological Photonics and the four-dimensional quantum Hall effect

July 3 at 15:00 - 17:00, 2018

Dr. Tomoki Ozawa (Senior Research Scientist, iTHEMS)

Venue: 1F Meeting Room, AIMR Main Building

Event Official Language: English

## Denso IT Lab. and RIKEN Joint Innovation Seminar

June 29 at 16:00 - 17:40, 2018

16:00-17:00 Denso IT Laboratory "About Denso IT lab." H. Iwasaki (Denso) "Human-Car interface" H. Tsukahara (Denso) "Math in machine leaning and computer vision" K. Ishikawa (Denso) 17:00-17:...more

Venue: Common Room #246-248

Event Official Language: Japanese

## Introduction to spin-boson model

June 22 at 10:30 - 17:30, 2018

Dr. Takeo Kato (The Institute for Solid State Physics (ISSP), The University of Tokyo)

10:30-12:30 Introduction to spin-boson model @DR3 (14th Building 213) 14:00-15:30 Kondo effect @DR7 (14th Building 217) 16:00-17:30 Detail of NIBA formalism @DR7 (14th Building 217)

Venue: Yagami Campus, Keio University

Event Official Language: Japanese

## Relative and equivariant Lagrangian Floer homology and Atiyah-Floer conjecture

June 19 at 14:30 - 16:00, 2018

Prof. Kenji Fukaya (Senior Visiting Scientist, iTHEMS)

Supported by RIKEN iTHEMS and Tuesday Seminar on Topology (Graduate School of Mathematical Sciences, The University of Tokyo).

Venue: Room 056, Graduate School of Mathematical Sciences, The University of Tokyo

Event Official Language: Japanese

## 1-form Lieb-Schultz-Mattis theorem and anomaly matching in quantum dimer model

June 8 at 13:30 - 17:00, 2018

Dr. Yuta Kikuchi (RBRC Researcher, Theory Group, RIKEN BNL Research Center)

Venue: SUURI-COOL (Kyoto)

Event Official Language: Japanese

## Abelian-Higgs dualities in quantum defect-mediated melting phase transitions

April 27 at 14:30 - 17:30, 2018

Dr. Aron Beekman (Keio University)

Venue: Seminar Room #160

Event Official Language: English

## Thermodynamic of a one-dimensional Bose gas at low temperature & superfluidity in neutron-star matter

April 24 at 15:30 - 16:30, 2018

Dr. Giulia De Rosi (The Institute of Photonic Sciences, Barcelona, Spain)

Venue: Seminar Room #160

Event Official Language: English

## Numerical analysis of point vortex dynamics by the method of fundamental solutions

April 17 at 16:00 - 17:30, 2018

Dr. Koya Sakakibara (Assistant Professor, Kyoto University)

iTHEMS / KUAMS Joint Seminar

Venue: Maskawa Hall, 1F, Maskawa Building for Education and Research

Event Official Language: Japanese

## Including an ocean mixing model in atmospheric data assimilation: a case of Typhoon Soudelor 2015

April 17 at 15:00 - 15:30, 2018

Dr. Kohei Takatama (Postdoctoral Researcher, Data Assimilation Research Team, RIKEN Center for Computational Science)

Venue: Maskawa Hall, 1F, Maskawa Building for Education and Research

Event Official Language: English

## iTHEMS Starter Meeting

April 6 at 12:30 - 15:00, 2018

Venue: Common Room #246-248

Event Official Language: English

## Resurgence Theory for Non-Perturbative Quantum Analysis

March 28 at 13:00 - 15:00, 2018

Dr. Tatsuhiro Misumi (Visiting Scientist, iTHEMS)

Venue: Seminar Room #160

Event Official Language: English

## Introduction to exact WKB analysis

March 27 at 10:00 - 12:00, 2018

Dr. Kohei Iwaki (Nagoya University)

Venue: Seminar Room #160

Event Official Language: English

## Anomaly matching for spin chains

March 19 at 14:00 - 16:00, 2018

Dr. Yuya Tanizaki (Special Postdoctoral Researcher, Theory Group, RIKEN Nishina Center for Accelerator-Based Science)

Venue: Seminar Room #160

Event Official Language: English

## Several identities related to the degenerate Bernoulli polynomials and numbers

February 24 at 16:00 - 17:00, 2018

Prof. Takao Komatsu (Wuhan University, China)

Venue: Seminar Room #160

Event Official Language: English

## Diophantine Frobenius Problems — counting theory, generating function and zeta functions

February 23 at 16:00 - 17:00, 2018

Prof. Takao Komatsu (Wuhan University, China)

Venue: Seminar Room #160

Event Official Language: English