### Past Events

### [Topology and Geometry Seminar] "Stable Homotopy and Differential Topology" by Tirasan Khandhawit

2018年8月16日 (木) 15:00Stable homotopy and differential topology

### Thursday Teatime

2018年8月16日 (木) (All day)Thursday Tea time- a sign that the weekend is just around the corner. Pop-in at Grano at 4.00pm today to meet and greet friends over cupfuls of hot tea.

### [Seminar] Comparative Transcriptomic and Epigenomic Analyses of Retinal Müller Glia during Different Damage Paradigms in Zebrafish, Chick, and Mouse by Professor David R. Hyde

2018年8月15日 (水) 14:00[Seminar]

**Title:** Comparative Transcriptomic and Epigenomic Analyses of Retinal Müller Glia during Different Damage Paradigms in Zebrafish, Chick, and Mouse

**Speaker: **Professor David R. Hyde

**Institution:** University of Notre Dame

**Seminar Venue: **B503, Center Building

### [Seminar] "Constraining Quantum Gravity from the Bottom-up" by Dr. Scott Melville

2018年8月14日 (火) 15:00Gravity on large scales is relatively well understood. For galaxies, planets and apples: we have Einstein’s General Relativity with which to make accurate predictions. But on small scales, where quantum mechanics becomes important, gravity is more difficult to understand, and as a result we lack precise descriptions of various natural phenomena (such as black holes).

One way to make progress in in our search for quantum gravity is to start from the large scale theory we know and love (at the ‘bottom’), and look for ways in which it may be modified and improved as we zoom in to smaller scales (going ‘up’ to a more fundamental theory).

Recent progress in ‘Effective Field Theory’ may shed some light on the connections between large and small scale physics. By exploiting certain physical properties of scattering probabilities (e.g. that they are unitary, causal and local), one can derive an infinite number of constraints which any large scale theory must satisfy in order to admit a sensible small scale completion.

In this talk, I will provide an overview of these new ‘positivity constraints’, and discuss their implications for quantum gravity.

### QG group meeting - the complex action of GR and black hole entropy

2018年8月13日 (月) 15:30QG group meeting

Speaker: Yasha Neiman

Title: "The complex action of GR and black hole entropy"

### Student Assembly Meeting

2018年8月10日 (金) 17:00All OIST students are welcome to attend this event.

### OIST Presidential Lecture - "Origami - Mathematics, Science and Technology" by Prof. Lakshminarayanan Mahadevan

2018年8月10日 (金) 10:00Origami, the exquisite craft of folding paper into three-dimensional shapes, has been practiced for millennia by artists and lay people. Prof. Mahadevan will discuss some physical aspects of rigid and soft origami associated with the weak and strong deformations of thin sheets of any material. The eﬃcient packing properties of folded matter suggest that it ought to occur naturally in physical and biological systems, and he will show that they do indeed appear on a range of scales, e.g. in drying gels, wings, leaves and even your gut as a self-organized pattern. These physical manifestations of origami suggest the question of how to design the number, location and orientation of folds to create complex shapes. Prof. Mahadevan will ﬁnish his talk with a description of attempts to solve this inverse problem, and its generalizations.

### [Topology and Geometry Seminar] "Solving Word Problems in finitely presented groups" by Robert Tang

2018年8月9日 (木) 15:00[Topology and Geometry Seminar] "Solving Word Problems in finitely presented groups" by Robert Tang

### Study Session: "外部資金獲得に向けた申請戦略と研究計画の作成法" Japanese ONLY

2018年8月8日 (水) 10:00プロポーザルの基本とは、相手を適切に想定し、相手の聞きたいポイントを聞きたい順に提示していくことです。

本勉強会では、個々の持っている研究テーマについて、深く広く考え、その学術的な価値を再認識していただく事から始め、

伝えるべきポイント、伝え方についても学んでいただきます。