# Hot Topic

## iTHEMS-Kyushu WS - from particles and nuclei to cosmos -

2018-11-27

On Nov.21-22, 2018, iTHEMS-Kyushu WS - from particles and nuclei to cosmos - was held at iTHEMS Kobe office (SUURI-COOL Kobe).

About 20 researchers got together from iTHEMS and Kyushu Univ. to discuss various aspects of quantum many-body theory, quantum field theory and explosive astrophysical phenomena in a very relaxed atmosphere. We will continue to organize such intensive workshop between iTHEMS and Kyushu Univ. in various fields of mathematical sciences in the future.

# Seminar Report

## iTHEMS Public Lectures at RIKEN Kobe Campus Open House

2018-11-27

On Nov. 28, 2018, the annual open campus of RIKEN Kobe was held.

From this year, iTHEMS, which has a Kobe office (SUURI-COOL Kobe), joins this event and organized public lectures "Hot topics in Mathematical Sciences".

This year 's program was

Tetsuo Hatsuda "The world that mathematical sciences open"

Ade Irma Suriajaya "How can something infinite become finite?"

Jeffrey Fawcett "What are genomes? - Toward decoding the language of life - "

Masato Taki and Noriaki Ogawa "Artificial intelligence and its medical application"

Shigenori Otsuka and Shunji Kotsuki "Frontiers in weather forecast research"

The lectures were held in the auditorium at the 8th floor of the Kobe IIB building (iTHEMS office is in the 7th floor). Each speaker gave a 30-40 min. talk followed by lots of interesting questions from the audience. It was amazing to see that iTHEMS researchers are not only extraordinary in their own research but also super science communicators !

# Upcoming Events

## Workshop

### Workshop on Recent Developments of Chiral Matter and Topology

December 6 - 9, 2018

The aim of this workshop is to gather researchers of high-energy and condensed-matter physics working on chiral Matter and Topology, to exchange ideas and establish collaborations to tackle unsolved issues and carry out future extensions. The workshop expects to welcome 40-60 participants who are interested in the aforementioned topics.

Organizers:

Tomoki Ozawa, Tetsuo Hatsuda (RIKEN iTHEMS)

Di-Lun Yang (RIKEN Nishina Center; YITP, Kyoto)

Chang-Tse Hsieh (Kavli IPMU / ISSP, the Univ. of Tokyo)

Jiunn-Wei Chen, Guang-Yu Guo (National Taiwan Univ.)

Hsiang-Nan Li (Academia Sinica)

Venue: National Taiwan University, Taipei, Taiwan

Event Official Language: English

## Seminar

### Probability density functions attached to zeta functions

December 6 at 16:00 - 17:00, 2018

Dr. Masahiro Mine (Tokyo Institute of Technology)

The study of the value-distribution of the Riemann zeta function is a classical topic in analytic number theory. In 1930s, Bohr and Jessen proved the existence of a certain limit value regarded as the probability that values of the Riemann zeta function belong to a given region in the complex plane. After Bohr and Jessen, similar results were proved for many other zeta functions. In this talk, I'll talk about density functions of such probabilities attached to the value-distributions of zeta functions. The density functions, which were named ``M-functions'' by Ihara, are connected with mean values of zeta functions, distributions of zeros of zeta functions, and so on.

Venue: Seminar Room #160, 1F Main Research Building, RIKEN

Event Official Language: English

## Special Lecture

### The physical and biological basis of tissue growth

December 12 at 15:00 - 16:30, 2018

Dr. Kaoru Sugimura (Program-Specific Research Center Associate Professor, Kyoto University)

Dr. Shuji Ishihara (Project Associate Professor, The University of Tokyo)

15:00 - 15:40 "Physical and molecular mechanism of cell rearrangement" Kaoru Sugimura

15:50 - 16:30 "From cells to tissue: A continuum model of epithelial tissue mechanics" Shuji Ishihara

Venue: Okochi Hall, 1F Laser Science Laboratory, RIKEN

Broadcast: R511, Computational Science Research Building, R-CCS, Kobe Campus, RIKEN / SUURI-COOL (Kyoto), #204-205, 2F Maskawa Building for Education and Research, North Campus, Kyoto University / SUURI-COOL (Sendai), #303, 3F AIMR Main Building, Advanced Institute for Materials Research (AIMR), Tohoku University

Event Official Language: Japanese

## Math Lecture

### Theory of Operator Algebras (6th)

December 20 at 15:30 - 17:00, 2018

Dr. Yosuke Kubota (Research Scientist, iTHEMS)

Title: An introduction to operator algebras

Abstract: Operators are linear maps from a (usually an infinite dimensional) linear space (most frequently the Hilbert space) to itself, which is like matrices of infinite degree. Operators form an algebra by obvious addition and multiplication. Operators appear in most of the fields in mathematics, in algebra, in geometry, in analysis, ... Some of the key words at the beginning of these lectures are "spectral theory" "operator algebras" "Tomita-Takesaki theory". These lectures are for non-professional people.

Venue: Seminar Room #160, 1F Main Research Building, RIKEN

Event Official Language: Japanese

## Math Lecture

### Introduction to Public-Key Cryptography (7th)

January 18 at 15:00 - 17:00, 2019

Dr. Eren Mehmet Kıral (Visiting Scientist, iTHEMS / Visiting Scientist, Faculty of Science and Technology, Sophia University)

Venue: Seminar Room #160, 1F Main Research Building, RIKEN

Event Official Language: English

## Conference

### The 7th International Symposium on Data Assimilation (ISDA2019)

January 21 - 24, 2019

The symposium will focus on the cross-cutting issues shared in broad applications of data assimilation from geoscience to various physical and biological sciences. In particular, the symposium will enhance discussions among researchers with various background on, for example, non-Gaussian and nonlinear data assimilation problems, Big Data Assimilation (BDA), high-performance computation (HPC), Uncertainty Quantification (UQ), advanced intelligence (AI) and machine learning, multi-scale and multi-component treatments, observational issues, and mathematical problems.

Abstract Submission Deadline: October 14, 2018 at 11:59 p.m. UTC

Registration Deadline: December 16, 2018 at 11:59 p.m. UTC

Submission/Registration Fee: Free

Venue: 6F auditorium, Computational Science Research Building, R-CCS, Kobe Campus, RIKEN

Event Official Language: English

## Workshop

### RIKEN-Berkeley WS on Quantum Information Science (RB19)

January 25 - 29, 2019

Initiated by the RIKEN Interdisciplinary Theoretical and Mathematical Sciences (iTHEMS) program at Berkeley, this workshop will focus on the development of quantum computing techniques, quantum

materials, and quantum sensing, as well as their corresponding applications to physical sciences, with an emphasis to galvanize the participants into future collaboration.

ORGANIZING COMMITTEE:

Chia Cheng Chang (RIKEN iTHEMS/UCB/LBNL NSD)

Takumi Doi (RIKEN iTHEMS)

Tetsuo Hatsuda (RIKEN iTHEMS)

Wick Haxton (UCB/LBNL NSD/RIKEN iTHEMS)

Alan Poon (LBNL NSD/BQ)

ADVISORY COMMITTEE:

Jonathan Carter (LBNL CRD/BQ)

Yasunobu Nakamura (RIKEN CEMS/Tokyo)

Franco Nori (RIKEN/Michigan)

Thomas Schenkel (LBNL AT-AP/BQ)

Irfan Siddiqi (UCB/BQ)

Seigo Tarucha (RIKEN CEMS/Tokyo)

Co-hosted by

RIKEN iTHREMS

RIKEN CEMS

Lawrence Berkeley National Lab. (LBNL)

Univ. of California at Berkeley (UCB)

Supported by

Berkeley Quantum (bq)

US Dept. of Energy (DOE)

Venue: Lawrence Berkeley National Laboratory (Berkeley, California)

Event Official Language: English

## Workshop

### Workshop of Nuclear-Astrophysics by UKAKUREN/Japan Forum of Nuclear Astrophysics (JaFNA): Nuclear data & Heavy Element Nucleosynthesis

March 6 - 8, 2019

We are pleased to announce that we will have a meeting on Nuclear-Astrophysics at Hokkaido Univ. Especially this time we will focus on the impact of nuclear data & nucleosynthesis of heavy elements. Gravitational wave is another keyword.

This workshop is held by UKAKUREN (JaFNA), together with Nuclear Reaction Data Centre, Hokkaido University (JCPRG). This workshop is supported by iTHEMS, CNS, RCNP, NAOJ, KEK, and WNSC.

You are welcomed to join us. For registration, please fill in the attached form (in Japanese) and send it to: sec-ukakuren18@kek.jp by 30th November 2018.

We are looking forward to seeing you at Hokkaido U.

Organizers

T. Kajino (Chair), T. Kawabata (Osaka), H. Utsunomiya (Konan), S. Nishimura (RIKEN), H. Yamaguchi (CNS), T.Hayakawa (QST), T.Motobayashi (RIKEN),

K.Terada(Osaka), S.Nagataki(RIKEN), S.Chiba(TIT), T.Tamagawa(RIKEN), W.Aoki(NAOJ), S.Wanajo(AEI), S.Kubono(RIKEN), T.Shima(RCNP)

Venue: Hokkaido University Conference Hall

Event Official Language: Japanese

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