Lie群論・表現論セミナー

過去の記録 ~02/25次回の予定今後の予定 02/26~

開催情報 火曜日 16:30~18:00 数理科学研究科棟(駒場) 126号室
担当者 小林俊行
セミナーURL https://www.ms.u-tokyo.ac.jp/~toshi/seminar/ut-seminar.html

2012年11月06日(火)

16:30-17:30   数理科学研究科棟(駒場) 126号室
奥田隆幸 氏 (東京大学)
An explicit construction of spherical designs on S^3 (JAPANESE)
[ 講演概要 ]
The existence of spherical t-designs on S^d for any t and d are proved by Seymour--Zaslavsky in 1984.
However, explicit constructions of spherical designs were not known for d > 2 and large t.
In this talk, for a given spherical t-design Y on S^2, we give an
algorithm to make a spherical 2t-design X on S^3 which maps Y by a Hopf map. In particular, by combining with the results of Kuperberg in 2005, we have an explicit construction of spherical t-designs on S^3 for any t.