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Can anyone help me on this problem? --Keon 21:13, 4 February 2009 (UTC)


I have no idea about the combinatorial proof thing..

what am I supposed to to for the combinatorial proof..?? --Kangw 00:33, 5 February 2009 (UTC)

Alumni Liaison

Correspondence Chess Grandmaster and Purdue Alumni

Prof. Dan Fleetwood