***** KAIST Discete Math Semianr *****
DATE: March 6th, Thursday
TIME: 3PM-4PM
PLACE: E6-1, ROOM 1409
SPEAKER: Otfried Cheong, KAIST, Korea.
TITLE: Helly-Type Theorems for Line-Transversals to Spheres
We prove Helly-type theorems for line transversals to disjoint unit
spheres in R^d. In particular, we show that a family of n >= 2d disjoint
unit spheres in R^d has a line transversal if, for some ordering of the
balls, any subfamily of 2d balls admits a line transversal consistent
with this ordering. We also discuss generalizations that drop the
ordering requirement and to spheres with arbitrary radius.
----------------------------------------------
Informations on future talks can be found at :
http://math.kaist.ac.kr/~sangil/seminar.php
Please email to sangil (at) kaist.edu if you wish to receive this
announcements in the future by email.