Title
On The Stretch Factor Of Convex Polyhedra Whose Vertices Are (Almost) On A Sphere
Abstract
Let P be a convex simplicial polyhedron in R-3. The skeleton of P is the graph whose vertices and edges are the vertices and edges of P, respectively. We prove that, if these vertices are on a sphere, the skeleton is a (0.999 . pi)-spanner. If the vertices are very close to a sphere, then the skeleton is not necessarily a spanner. For the case when the boundary of P is between two concentric spheres of radii gamma and R, where R > gamma > 0, and the angles in all faces are at least theta, we prove that the skeleton is a t-spanner, where t depends only on R/r and theta. One of the ingredients in the proof is a tight upper bound on the geometric dilation of a convex cycle that is contained in an annulus.
Year
Venue
DocType
2015
JOURNAL OF COMPUTATIONAL GEOMETRY
Journal
Volume
Issue
ISSN
7
1
1920-180X
Citations 
PageRank 
References 
0
0.34
6
Authors
8
Name
Order
Citations
PageRank
Prosenjit K. Bose12336293.75
Paz Carmi232143.14
Mirela Damian321228.18
Jean-Lou De Carufel47622.63
darryl j hill500.34
Anil Maheshwari6869104.47
Yuyang Liu752.82
Michiel Smid870969.98