Colloquium
Title
See the Japanese page
Date
2016.1.6 (Wed) 15:30~16:30 (16:30- tea)
Place
Rm110, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Yasutaka Shimizu (Waseda University)
Title
See the Japanese page
Date
2016.1.6 (Wed) 17:00~18:00 (16:30- tea)
Place
Rm110, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Takuya Sakasai (The University of Tokyo)
Title
See the Japanese page
Date
2015.12.16 (Wed) 15:20~16:20
Place
Rm110, Building No.3, Faculty of Science, Kyoto University
Speaker
Kenji Fukaya (Stony Brook University)
Title
See the Japanese page
Date
2015.12.16 (Wed) 17:00~18:00
Place
Rm110, Building No.3, Faculty of Science, Kyoto University
Speaker
Takeshi Torii (Okayama University)
Title
Finite multiple zeta values
Date
2015.12.9 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Masanobu Kaneko (Kyushu University)
Abstract
We discuss two very different “finite” versions of the classical multiple zeta values. After giving some basics, we present a conjectural isomorphism of the two rings of finite multiple zeta values and give some results which support our conjecture. This is a joint work with Don Zagier.
Title
See the Japanese page
Date
2015.12.2 (Tue) 15:30~16:30 (15:00- tea)
Place
Rm110, Building No.3, Faculty of Science, Kyoto University
Speaker
Yoshihiro Sawano (Tokyo Metropolitan University)
Title
See the Japanese page
Date
2015.12.2 (Wed) 16:45~17:45 (15:00- tea)
Place
Rm110, Building No.3, Faculty of Science, Kyoto University
Speaker
Kazuo Akutagawa (Tokyo Institute of Technology)
Title
Distinguished automorphic spectrum of unitary groups
Date
2015.11.18 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Masao Tsuzuki (Sophia University)
Title
See the Japanese page
Date
2015.11.11 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Kotaro Tsugawa (Nagoya University)
Title
See the Japanese page
Date
2015.11.4 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Daisuke Furihata (Osaka University)
Title
Randomness-induced phenomena and negativity of generic random dynamical systems of complex polynomials
Date
2015.10.28 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Building No.3, Faculty of Science, Kyoto University
Speaker
Hiroki Sumi (Osaka University)
Abstract
We consider random dynamical systems of complex polynomial maps on the Riemann sphere. In the usual iteration dynamical system of a single rational map of degree two or more, we have a kind of chaos in the Julia set and the Hausdorff dimension of the set of initial values whose Lyapunov exponent is negative, is positive. However, in this talk, we show that for a generic random dynamical systems of complex polynomials, for all but countable initial values $z$, for almost every sequence of polynomials, the Lyapunov exponent is negative and the chaoticity of the averaged system is much weaker than usual iteration dynamical system. There are many new phenomena in random dynamical systems which cannot hold in the usual iteration dynamical systems. We call such phenomena "randomness-induced phenomena". We investigate the mechanisms and background of these phenomena.
Title
"The Hole Story": how to solve problems in multiply connected domains
Date
2015.10.21 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Building No.3, Faculty of Science, Kyoto University
Speaker
Darren Crowdy (Imperial College London)
Abstract
This talk will survey recent developments in providing novel constructive methods for the solution of boundary value problems in multiply connected, or "holey", planar domains. All the investigations are driven by problems arising in applications and examples will be given. Two distinct mathematical approaches will be described: one based on special function theory, and another centred around generalized transform methods. The setting for the special function theory approach tackles the problems on a compact Riemann surface naturally associated to any planar multiply connected domain known as the Schottky double, and makes use of the Schottky-Klein prime function associated therewith. On the other hand, our new transform approach for multiply connected domains generalizes and combines classical transform ideas of Fourier and Mellin with more recent developments pioneered by A. S. Fokas and collaborators.
Title
The generalized principal eigenvalue for viscous Hamilton-Jacobi equations and stochastic optimal control
Date
2015.10.14 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Building No.3, Faculty of Science, Kyoto University
Speaker
Naoyuki Ichihara (Aoyama Gakuin University)
Title
On regularity of axially symmetric Navier-Stokes flows
Date
2015.10.7 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Building No.3, Faculty of Science, Kyoto University
Speaker
Ken Abe (Kyoto University)
Title
Geometry of Quantum Information via Holographic Principle
Date
2015.7.15 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Building No.3, Faculty of Science, Kyoto University
Speaker
Tadashi Takayanagi (Kyoto University)
Title
Hydrodynamics of swimming microorganisms and its application to biology of reproduction
Date
2015.7.8 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Kenta Ishimoto (RIMS, Kyoto University)
Title
On invariants related to the Chern-Simons perturbation theory
Date
2015.7.1 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Tatsuro Shimizu (RIMS, Kyoto University)
Title
Mathematics in Simulations of Musical Instruments
Date
2015.6.24 (Wed) 15:00~16:00 (16:00- tea)
Place
Rm127, Building No.3, Faculty of Science, Kyoto University
Speaker
Takaharu Yaguchi (Kobe University)
Abstract
Much attention has recently been paid to musical sound synthesis using partial differential equation models. Compared to the conventional signal-processing approach, the parameters in the PDE models have physical interpretation. This enables appropriate parameter fitting and the design of more realistic models. The research on this approach is still at the beginning and there remain many interesting mathematical problems. In this talk, recent developments on piano simulations are exemplarily presented. Some mathematical challenges are also shown.
Title
On automorphisms of Enriques surfaces
Date
2015.6.24 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm127, Building No.3, Faculty of Science, Kyoto University
Speaker
Hisanori Ohashi (Tokyo University of Science)
Title
Can a computer be a mathematician?
Date
2015.6.17 (Wed) 15:00~16:00
Place
Rm420, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Kazushige Terui (RIMS, Kyoto University)
Title
Geometry of contracting geodesics
Date
2015.6.17 (Wed) 16:30~17:30
Place
Rm420, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Koji Fujiwara (Kyoto University)
Title
The Fourier Transform and the Calculus of Residues
Date
2015.6.10 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Machiel van Frankenhuijsen (RIMS & Utah Valley University)
Abstract
The introduction of Fourier analysis in number theory dates back to Tate's thesis and at the time greatly clarified the functional equation of L-series. For global function fields, the local characters seem to be given by a residue. Lifting to characteristic zero, we will see that this is indeed the case. Back to number theory, we will give some speculations how the characters, as originally defined by Tate in an ad hoc manner, could be viewed as residues as well.
Title
Periods of residual automorphic forms
Date
2015.6.3 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Building No.3, Faculty of Science, Kyoto University
Speaker
Shunsuke Yamana (Kyoto University)
Title
On the exact WKB analysis for holonomic systems --- present and prospect
Date
2015.5.27 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Yoshitsugu Takei (RIMS, Kyoto University)
Title
Mathematical analysis of moving free boundaries
Date
2015.5.20 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Building No.3, Faculty of Science, Kyoto University
Speaker
Karel Svadlenka (Kyoto University)
Title
The Cremona group
Date
2015.5.13 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Igor Dolgachev (University of Michigan)
Abstract
The Cremona group in dimension n is the group of automorphisms of the field or rational function in n variables with coefficients in a field K. In geometric language, it is the group of birational transformations of the projective n-dimensional projective space over K. I will report on the recent progress in the study of this group based on the techniques of hyperbolic geometry and the theory of complex dynamical systems.
Title
Growth rate of the number of periodic points for generic dynamical systems
Date
2015.4.22 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Building No.3, Faculty of Science, Kyoto University
Speaker
Masayuki Asaoka (Kyoto University)
Title
Some finiteness results on abelian varieties
Date
2015.4.15 (Wed) 16:30~17:30 (16:00- tea)
Place
Rm110, Research Institute for Mathematical Sciences, Kyoto University
Speaker
Yoshiyasu Ozeki (RIMS, Kyoto University)
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