- To: mathgroup at smc.vnet.net
- Subject: [mg15169] combinatorics
- From: "mcp" <mcp at public.ytptt.sd.cn>
- Date: Thu, 17 Dec 1998 00:27:47 -0500
- Sender: owner-wri-mathgroup at wolfram.com
problem:a grid with (m+1) row and [m*C(m+1,2)+1] column,to fill the grid with m kind of colors, one little grille with one kind color. In the grid ,there must be a rectangle of which four corner grilles have same color. Why?