Subject: spinner spanner
Date: Thu, 15 Jan 2004 08:51:15 -0500 (EST)
From: James Stasheff <stasheff@email.unc.edu>
To: dmd1@lehigh.edu
CC: jds@hans.math.upenn.edu, <conrad@euclid.math.temple.edu>

The fact that the fundamental group of O(3) is Z/2
can be illustrated (literally) by the contortion with a water glass
rotating wrist and arm through 720 degress
I once saw a series of still illustrating this
perhaps in Scientific American

anyone have any reference?

.oooO   Jim Stasheff            jds@math.unc.edu
(UNC)   since retiring from UNC hanging out at U Penn   jds@math.upenn.edu
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