Hello colleagues. I am Yoshiyuki Inoue, a senior research scientist here at iTHEMS. I am leaving iTHEMS and joining Osaka University as an associate professor. It has been almost three years since I came here. I would like to thank all the iTHEMS friends for your kind support and help, especially Hatsuda-san, Tada-san, and assistants. The open research atmosphere allowed me to expand my research area a lot, e.g., collaboration with other RIKEN researchers. I believe the interdisciplinary and academic freedom mind in iTHEMS is essential for future research. I will bring and spread this iTHEMS spirit in Osaka. Even after moving to Osaka, I will keep visiting our precious research place, iTHEMS (the coffee room, maybe?). I wish future success of iTHEMS research activity.

It is our greatest pleasure to inform you that our iTHEMS colleague, Yosuke Kubota received 2020 Takebe Katahiro Prize for Encouragement of Young Researchers from The Mathematical Society of Japan (MSJ) for his contribution to the "Applications of operator K theory in geometry”. This prize was established by MSJ in honor of the renowned Japanese Mathematician in Edo period, Katahiro Takeba (1664 –1739).

The article written by Dr. Jeffrey Fawcett, Senior Research Scientist, was published in this month's RIKEN News. He wrote about the genetics of Thoroughbred horses and his research using genomic data of Japanese Thoroughbreds.

In 1638, Galileo Galilei proposed “the square-cube law”: the ratio of two volumes is greater than the ratio of their surfaces. This law enables us to understand why large animals like elephants need longer time to cool their body temperature than small ones like human. On July 17th, Miki Ebisuya at European Molecular Biology Laboratory (EMBL) explained why human needs longer time to develop her/his body than mouse, at the iTHEMS seminar. In fact, the speed of the segment formation ("taisetsu" in Japanese) of human is twice or three times as slow as that of mouse. By combining state-of-the-art experiments and a model with two variables, her group discovered that the difference of tempos is due to the difference of biochemical parameters. The talk was clear and enjoyable. And it was accessible to the diverse audience. As a mathematician asked during the talk, their discovery raises a new fundamental question about why reactions in human are slower than those in mouse. The question might be also answered by the collaboration between biology and mathematics in a future.

On 9th September, Masashi Tachikawa (Kyoto University) gave us a talk on adaptive dynamics as a framework for evolutionary dynamics. He first gave us a quick overview for modeling evolution, and then introduced adaptive dynamics toolbox and pairwise invasibility plots to visualize trait-substitution processes towards evolutionarily singular points. He finally talked about how to capture evolutionary branching (two morphs emerging) using envelope with a trait value being tuned as-if a parameter. We all excitedly learned a lot from this talk. Thank you, Masashi!
-Ryosuke Iritani

Title: 3D modeling from the onset of the SN to the full-fledged SNR: Role of an initial ejecta anisotropy on matter mixing
Author: Antonio Tutone, Salvatore Orlando, Marco Miceli, Sabina Ustamujic, Masaomi Ono, Shigehiro Nagataki, Gilles Ferrand, Emanuele Greco, Giovanni Peres, Donald C. Warren
arXiv: http://arxiv.org/abs/2009.01157v1

Title: Snowmass 2021 Letter of Interest: The GRAMS Project: MeV Gamma-Ray Observations and Antimatter-Based Dark Matter Searches
Author: Tsuguo Aramaki, Jonathan Asaadi, Yuto Ichinohe, Yoshiyuki Inoue, Georgia Karagiorgi, Jon Leyva, Reshmi Mukherjee, Hirokazu Odaka, Kerstin Perez, William Seligman, Satoshi Takashima, Naomi Tsuji, Hiroki Yoneda
arXiv: https://arxiv.org/abs/2009.03754

Title: The index theorem of lattice Wilson--Dirac operators via higher index theory
Author: Yosuke Kubota
arXiv: http://arxiv.org/abs/2009.03570v1

Title: Area law of non-critical ground states in 1D long-range interacting systems
Author: Tomotaka Kuwahara, Keiji Saito
arXiv: http://arxiv.org/abs/1908.11547v2