## Pavel Valtr Department of Applied Mathematics Charles University Czech Republic email: valtr@CSPGUK11.bitnet Report B 94-01 January 94

Get the report here or by anonymous ftp: Server: fubinf.inf.fu-berlin.de File: pub/reports/tr-b-94-01.ps.gzWe show that $n$ random points chosen independently and uniformly from a parallelogram are in convex position with probability $$\left({{2n-2\choose n-1}\over n!}\right)^2.$$