Covering shadows with a smaller volume
| dc.creator | Klain, Daniel A. | |
| dc.date | 2008-04-17 | |
| dc.date | 2009-05-20 | |
| dc.date.accessioned | 2026-07-07T13:16:14Z | |
| dc.date.available | 2026-07-07T13:16:14Z | |
| dc.description | For each i = 1, ..., n constructions are given for convex bodies K and L in n-dimensional Euclidean space such that each rank i orthogonal projection of K can be translated inside the corresponding projection of L, even though K has strictly larger m-th intrinsic volumes (i.e. V_m(K) > V_m(L)) for all m > i. It is then shown that, for each i = 1, ..., n, there is a class of bodies C{n,i}, called i-cylinder bodies of R^n, such that, if the body L with i-dimensional covering shadows is an i-cylinder body, then K will have smaller n-volume than L. The families C{n,i} are shown to form a strictly increasing chain of subsets C{n,1} < C{n,2} < ... < C{n,n-1} < C{n,n}, where C{n,1} is precisely the collection of centrally symmetric compact convex sets in n-dimensional space, while C{n,n} is the collection of all compact convex sets in n-dimensional space. Members of each family C{n,i} are seen to play a fundamental role in relating covering conditions for projections to the theory of mixed volumes, and members of C{n,i} are shown to satisfy certain geometric inequalities. Related open questions are also posed. | |
| dc.description | 21 pages | |
| dc.identifier | https://arxiv.org/abs/0804.2718 | |
| dc.identifier | http://arxiv.org/abs/0804.2718 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/230724 | |
| dc.subject | Metric Geometry | |
| dc.subject | 52A20; 52A39; | |
| dc.title | Covering shadows with a smaller volume | |
| dc.type | text |