Convex bodies with few faces

Details Convex bodies with few faces Convex bodies with few faces

1989-10-26

arxiv.org/abs/math/9201203v1

Mathematics

Metric Geometry

Scientific paper

It is proved that if $u_1,\ldots, u_n$ are vectors in ${\Bbb R}^k, k\le n, 1 \le p < \infty$ and $$r = ({1\over k} \sum ^n_1 |u_i|^p)^{1\over p}$$ then the volume of the symmetric convex body whose boundary functionals are $\pm u_1,\ldots, \pm u_n$, is bounded from below as $$|\{ x\in {\Bbb R}^k\colon \ |\langle x,u_i\rangle | \le 1 \ \hbox{for every} \ i\}|^{1\over k} \ge {1\over \sqrt{\rho}r}.$$ An application to number theory is stated.

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