幾何コロキウム
過去の記録 ~05/01|次回の予定|今後の予定 05/02~
開催情報 | 金曜日 10:00~11:30 数理科学研究科棟(駒場) 126号室 |
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担当者 | 植田一石,金井雅彦,二木昭人 |
備考 | 開始時間と開催場所などは変更されることがあるので, セミナーごとにご確認ください. |
2015年01月16日(金)
10:00-11:30 数理科学研究科棟(駒場) 126号室
西納 武男 氏 (立教大学)
Degeneration and curves on K3 surfaces (Japanese)
西納 武男 氏 (立教大学)
Degeneration and curves on K3 surfaces (Japanese)
[ 講演概要 ]
There is a well-known conjecture which states that all projective K3 surfaces contain infinitely many rational curves. By calculating obstructions in deformation theory through degeneration, we give a new approach to this problem. In particular, we show that there is a Zariski open subset in the moduli space of quartic K3 surfaces whose members fulfil the conjecture.
There is a well-known conjecture which states that all projective K3 surfaces contain infinitely many rational curves. By calculating obstructions in deformation theory through degeneration, we give a new approach to this problem. In particular, we show that there is a Zariski open subset in the moduli space of quartic K3 surfaces whose members fulfil the conjecture.