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1973 IMO Problems/Problem 2

Revision as of 12:09, 20 October 2013 by Elvis (talk | contribs) (Created page with "Determine whether or not there exists a finite set M of points in space not lying in the same plane such that, for any two points A and B of M; one can select two other points C ...")
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Determine whether or not there exists a finite set M of points in space not lying in the same plane such that, for any two points A and B of M; one can select two other points C and D of M so that lines AB and CD are parallel and not coincident.

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