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) |
| 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 |
| 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. |
