立命館大学数理科学科

• Date : 17 Sep. (Thu.)
• Place: W.W. 7th-floor, 4th lab.
• Time : 16:30-18:00
• Speaker: Dai Taguchi (Ritsumeikan University)

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• Date : 3 Sep. (Thu.)
• Place: W.W. 7th-floor, 4th lab.
• Time : 16:30-18:00
• Speaker: Toshihiro Yamada (Hitotsubashi University)

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• Date : 27 Aug. (Thu.)
• Place: W.W. 7th-floor, 4th lab.
• Time : 16:30-18:00
• Speaker: Ngoc Khue Tran (Ritsumeikan University)

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• Date : 13 Aug. (Thu)
• Place: W.W. 7th-floor, 4th lab.
• Time : 16:30-18:00
• Speaker: Noufel Frikha (University of Paris VII)

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• Date :  30 Jul. (Thu.)
• Place: W.W. 7th-floor, 4th lab.
• Time : 16:30-18:00
• Speaker:  Potiron Yoann (Chicago University)

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• Date :  23 Jul. (Thu.)
• Place: W.W. 7th-floor, 4th lab.
• Time : 16:30-18:00
• Speaker:  Dai Taguchi (Ritsumeikan University)

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幾何学セミナー

講演者：Gaël Meigniez（南ブルターニュ大学）
タイトル：h-principles and foliations
日時： 7月24日（金）16:30-18:00
場所： びわこ・くさつキャンパス ウェストウィング7階　数学第1研究室
アブストラクト：(collaboration with Francois Laudenbach)
Gromov’s h-principle is a collection of powerful tools to build geometric objects, by deformation of a formal data whose existence is easy to decide. This talk will introduce a new approach to the h-principle, in two steps. From the formal data, the first step builds a Haefliger Gamma-structure (singular foliation) of codimension zero with the desired transverse geometry. This step works, for several interesting geometries, on all manifolds, even closed (I shall treat the example of contact geometry). The second step regularizes the Gamma-structure; it consists essentially in a simple adaptation of Thurston’s inflation method; it works for all geometries, but only on open manifolds. We use a special subdivision of the simplex, due to Thom.

幾何学セミナー

講演者：廣田祐士（麻布大学）
タイトル：A brief look at Poisson geometry
日時： 7月17日（金）16:30-18:00
場所： ウェストウィング7階　数学第３研究室
アブストラクト： The talk is an overview of Poisson geometry. We plan to deal with Poisson manifolds involving Lie groupoids/algebroids at the first half of the talk, and at the second half, will discuss Dirac structures which are useful frameworks to unify Poisson geometry and symplectic geometry.

日時： 7月14日(火) 16:30 — 17:30
場所： 立命館大学 BKC フォレストハウス1階 F111
講演者： Fabrice Baudoin 氏（パデュー大学）
講演題目： Hypocoercive diffusions

アブストラクト： In this talk, we will present a new method to study the convergence to equilibrium of hypocoercive diffusions. The method is based on local computations and parallels the Bakry-Emery approach to hypercontractivity.

• Date : 9 Jul. (Thu.)
• Place: W.W. 7th-floor, 4th lab.
• Time : 16:30-18:00
• Speaker: Takafumi Amaba (Ritsumeikan University)

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