Colloquium(2013)

List of colloquium by year
Speaker Yoshihisa Saito（The University of Tokyo）
Title 量子座標環の表現論
Date January 15 (Wed.) 2014, 16:30～17:30
Place Dept. of Mathematics, General Research Bldg., 301
Abstract Japanese version only
Speaker Teruaki Kitano（Soka University）
Title 結び目群の表現の変形の障害としてのAlexander多項式
Date December 4 (Wed.) 2013, 16:30～17:30
Place Dept. of Mathematics, General Research Bldg., 301
Abstract Japanese version only
Speaker William Kantor（University of Oregon）
Title Short presentations of finite simple groups
Date November 28 (Thu.) 2013, 16:30～17:30
Place Dept. of Mathematics, General Research Bldg., 301
Abstract Group presentations somewhat started with Hamilton. I'll review 19th century history before getting to a recent result: almost all finite simple groups have presentations requiring surprisingly few relations (with Guralnick, Kassabov and Lubotzky). For example, all alternating (and symmetric) groups have presentations using only 3 generators and 7 relations. The proofs are relatively elementary but too long for more than a few small hints.
Speaker Hirotaka Akiyoshi（Osaka City University）
Title ３次元錐双曲構造の具体的構成
Date November 27 (Wed.) 2013, 16:30～17:30
Place Dept. of Mathematics, General Research Bldg., 301
Abstract Japanese version only
Speaker Hiroyuki Minamoto（Osaka Prefecture University）
Title 導来二重双対のホモトピー極限による記述
Date October 30 (Wed.) 2013, 16:30～17:30
Place Dept. of Mathematics, General Research Bldg., 301
Abstract Japanese version only
Speaker Michio Yoshiwaki（Osaka City University Advanced Mathematical Institute）
Title 三角圏の次元と多元環の表現論
Date October 30 (Wed.) 2013, 15:00～16:00
Place Dept. of Mathematics, General Research Bldg., 301
Abstract Japanese version only
Speaker Seiichi Kamada（Osaka City University）
Title カンドル代数と結び目理論
Date July 17 (Wed.) 2013, 16:30～17:30
Place Dept. of Mathematics, General Research Bldg., 301
Abstract Representation theory is a powerful tool. Often one can translate difficult questions (e.g. studying actions of Lie groups of manifolds or understanding rational points on elliptic curves) into questions in representation theory, where one has many techniques at one's disposal. My talk will focus on modular representation theory. This is a beautiful theory with many unsolved problems. I will explain the basics of Lusztig's conjecture on the simple characters of finite groups of Lie type, and state recent work giving counter-examples for many "small" prime numbers. I will not assume any background in representation theory or algebraic geometry. 　　
Speaker Zhu Jian-Feng（Huaqiao University）
Mizuho-DL Financial Technology Co.,Ltd. (Technical Fellow))
Title Some criteria for quasiconformality and Landau-Bloch constants of harmonic mappings in the unit disk
Date June 19 (Wed.) 2013, 16:30～17:30
Place Dept. of Mathematics, General Research Bldg., 301
Abstract PDF
Speaker Hiroaki Aikawa（Hokkaido University）
Title Intrinsic ultracontractivity and the boundary Harnack principle --- A unified approach with capacitary width
Date June 12 (Wed.) 2013, 16:30～17:30
Place Dept. of Mathematics, General Research Bldg., 301
Abstract We study intrinsic ultracontractivity for the semigroup associated with Dirichlet heat kernel. We give a sharp sufficient condition for intrinsic ultracontractivity, valid for arbitrary domains, in terms of capacitary width of sublevel sets of the Green function and the ground state. This condition, together with the Harnack inequality, yields sufficient conditions for intrinsic ultracontractivity of nonsmooth domains. Our approach employs a parabolic box argument, a counterpart of the box argument for the boundary Harnack principle. It enables us to treat intrinsic ultracontractivity and the boundary Harnack principle in parallel. 　　 　　
Speaker Masato Okado（Osaka City University）
Title 箱玉系とKKR写像
Date May 8 (Wed.) 2013, 16:30～17:30
Place Dept. of Mathematics, General Research Bldg., 301
Abstract Japanese version only
Last Modified on2015.11.24