Differential Geometry Seminar (2019)

As a project of OCAMI, we shall promote the seminar on differential geometry in the wide sense of including the areas related to geometric analysis, topology, algebraic geometry, mathematical physics, integrable systems, information sciences etc.

Contact Yoshihiro Ohnita
Hiroshi Tamaru
Shin Kato
Kaname Hashimoto
Masashi Yasumoto
Department of Mathematics Osaka City University
Sugimoto, Sumiyoshi-ku, Osaka, 558-8585, JAPAN
TEL 06-6605-2617 (Ohnita)
06-6605-2615 (Tamaru)
06-6605-2616 (Kato)
E-mail ohnita[at]sci.osaka-cu.ac.jp
tamaru[at]sci.osaka-cu.ac.jp
shinkato[at]sci.osaka-cu.ac.jp
h-kaname[at]sci.osaka-cu.ac.jp
yasumoto[at]sci.osaka-cu.ac.jp

　

List by Year

Speaker Naoya Ando　(Kumamoto University)
Title 共形 Gauss 写像
Date December 20 (Fri.) 2019, 16:30 ～ 18:00
Place Dept. of Mathematics, Sci. Bldg., F415
Abstract Japanese page only

　

Speaker Kazuyuki Enomoto（Emeritus Professor of Tokyo University of Science)
Title 4次元ユークリッド空間内の平坦トーラス
Date November 6 (Wed.) 2019, 15:15 ～ 16:45
Place Dept. of Mathematics, Sci. Bldg., F404
Abstract Japanese page only

　

Speaker Takaaki Nomura　(Emeritus Professor of Kyusyu University/OCAMI)
Title Minimum size matrix realization of a homogeneous convex cone
Date July 17 (Wed.) 2019, 16：00 ～ 17：30
Place Dept. of Mathematics, Sci. Bldg., F404
Abstract Japanese page only

　

Speaker Ryosuke Takahashi (OCAMI)
Title Canonical metrics, geometric flows and their quantization on K\”ahler geometry
Date April 24 (Wed.) 2019, 15：15 ～ 16：55
Place Dept. of Mathematics, Sci. Bldg., F404
Abstract Japanese page only

　

Speaker Hideyuki Ishi (Nagoya University)
Title Matrix realizations of homogeneous Hessian manifolds and codimension-one actions
Date April 19 (Fri.) 2019, 15：15 ～ 16：55
Place Dept. of Mathematics, Sci. Bldg., E408
Abstract Japanese page only

　

Speaker Uwe Semmelmann (University of Stuttgart)
Title Killing tensors on Riemannian manifolds
Date April 4 (Thu.) 2019, 13：30 ～ 15：00
Place Dept. of Mathematics, Faculty of Science Bldg., F415
Abstract Killing tensors are symmetric tensors such that the complete symmetrization of the covariant derivative vanishes. This generalizes the equation for Killing vector fields. Killing tensors are well studied in physics, in particular since they define first integrals, i.e. functions constant on geodesics. In my talk I will introduce a formalism for studying Killing and conformal Killing tensors. Using this notation I will discuss the most important properties and mention a few recent results, e.g. the non- existence on compact manifolds with negative sectional curvature and a classification result on Riemannian products. Moreover I will describe several examples of Killing tensors. My talk is based on two joint articles with K. Heil and A. Moroianu.