代数幾何学セミナー

過去の記録 ~06/16次回の予定今後の予定 06/17~

開催情報 金曜日 13:30~15:00 数理科学研究科棟(駒場) ハイブリッド開催/117号室
担当者 權業 善範、中村 勇哉、田中 公

2016年05月17日(火)

15:30-17:00   数理科学研究科棟(駒場) 122号室
伊藤敦 氏 (京大数学教室)
On dual defects of toric varieties (TBA)
[ 講演概要 ]
For a projective variety embedded in a projective space,
we can define the dual variety in the dual projective space.
By dimension count, the codimension of the dual variety is expected to be one,
but it can be greater than one for some varieties.

For a smooth toric variety, it is known that the codimension of the dual variety is greater than one
if and only if the toric variety is a suitable projective bundle over some toric variety.
In this talk, I will explain a generalization of this result to toric varieties without the assumption of singularities.
This is a joint work with Katsuhisa Furukawa.
[ 参考URL ]
https://sites.google.com/site/atsushiito221/