上海大学学报(自然科学版)

• 数理化科学 • 上一篇    下一篇

几类特殊几何体的迷向常数

吴力荣;何斌吾   

  1. 1.上海大学 理学院,上海 200444; 2.浙江工业职业技术学院,浙江 312000
  • 收稿日期:2006-03-25 出版日期:2007-02-28 发布日期:2007-02-28

Isotropic Constant of Some Special Geometric Bodies

WU Li rong;HE Bin wu   

  1. 1. School of Sciences, Shanghai University, Shanghai 200444, China; 2. Zhejiang Industry Polytechnic College, Shaoxing 312000, China
  • Received:2006-03-25 Online:2007-02-28 Published:2007-02-28

摘要: 设 K 是〖WTHZ〗R n 中体积为1,质心在原点的凸体, L K 是它的迷向 常数,寻找 L K 的上确界,是Banach空间局部理论(现代几何分析)中著名的未解决问 题.目前最好的上界估计是 L K

关键词: Bourgain问题, 迷向常数, 迷向体, 凸体

Abstract: Let K∈ 〖WTHZ〗R n be a convex body with volume | K |=1 and c enter o f mass at the origin. L K is an isotropic constant of K . Finding the le ast upper bound of L K is a well known open problem of Banach space local theory. Now the best estimate of upper bound is L K

Key words: Bourgain's problem, isotropic body, isotropic constant, convex body