A Characterization of Some Mixed Volumes via the Brunn–Minkowski Inequality
A Characterization of Some Mixed Volumes via the Brunn–Minkowski Inequality
复制标题
通过 Brunn-Minkowski 不等式描述某些混合体积
DOI:
--
复制
发表时间:
2012
影响因子:
1.1
通讯作者:
E. Saorín Gómez
中科院分区:
文献类型:
--
作者:
A. Colesanti;D. Hug;E. Saorín Gómez
We consider a functional documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} egin{document}$mathcal{F}$end{document} on the space of convex bodies in ℝn of the form documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} egin{document}$$ {mathcal{F}}(K)=int_{mathbb{S}^{n-1}} f(u) mathrm{S}_{n-1}(K,du), $$end{document} where documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} egin{document}$fin C(mathbb{S}^{n-1})$end{document} is a given continuous function on the unit sphere of ℝn, K is a convex body in ℝn, n≥3, and Sn−1(K,⋅) is the area measure of K. We prove that documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} egin{document}$mathcal{F}$end{document} satisfies an inequality of Brunn–Minkowski type if and only if f is the support function of a convex body, i.e., documentclass[12pt]{minimal} usepackage{amsmath} usepackage{wasysym} usepackage{amsfonts} usepackage{amssymb} usepackage{amsbsy} usepackage{mathrsfs} usepackage{upgreek} setlength{oddsidemargin}{-69pt} egin{document}$mathcal{F}$end{document} is a mixed volume. As a consequence, we obtain a characterization of translation invariant, continuous valuations which are homogeneous of degree n−1 and satisfy a Brunn–Minkowski type inequality.