[geometry-ml:06882] 東大数理・複素解析幾何セミナー 6/22

[shigeharu takayama]

皆様、

東大数理・複素解析幾何セミナーのお知らせです。

2026年06月22日(月) 10:30-12:00

オンライン開催のみ、対面での開催はありません。

講演者：四ッ谷 直仁 氏 (静岡大学/IMAG, Montpellier大学)
講演題目：Secondary polytopes of spherical varieties (Japanese)
[ 講演概要 ]
This talk is based on ongoing joint work with Thibaut Delcroix and
King Leung Lee. Our main objective is to investigate the Chow
stability of spherical varieties.
A celebrated theorem of Gelfand, Kapranov, Sturmfels, and Zelevinsky
(1992) states that the Chow polytopes of projective toric varieties
coincide with their secondary polytopes. In the spherical setting, one
can construct an analogous polytope, which may be viewed as a natural
generalization of the secondary polytope of a toric variety. In this
talk, I will explain the construction of this polytope and its
relation to Chow stability. Particular emphasis will be placed on how
the classical GKZ argument in the toric setting can be adapted to the
broader context of spherical varieties.

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今後の予定はこちら
https://www.ms.u-tokyo.ac.jp/seminar/geocomp/future.html

世話人
高山 茂晴、平地 健吾