演講公告

演講主題：Four-points semidefinite bound for equiangular lines
主講人：俞韋亘教授 (中央大學數學系)
演講日期：2022年3月1日(二) 14:00 ~15:00
演講地點：(光復校區) 科學一館223室
摘要內容：
Abstract
We offer an alternate version of the three-points semidefinite programming formula for spherical codes and spherical $s$-distance sets. The alternative formulas would be simpler when applying on spherical $s$-distance sets. Furthermore, we use the four-points semidefinite programming method symbolically to sharpen the upper bounds on the cardinality of equiangular lines in $R^d$. Our results improve the bounds for infinitely many dimensions $d$ with prescribed angles.
相關檔案：Talk_1110301.pdf

$返回$ go back