Date: Fri, 25 Oct 85 09:14:33 -0700 (PDT)
From: Rodney Hoffman <Hoffman.es@Xerox.ARPA>
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Subject: Rubik's Revenge: The Group Theoretical Solution
I only yesterday came across this from a couple of months ago: "Rubik's
Revenge: The Group Theoretical Solution" by M.E. Larsen, in the
'American Mathematics Monthly', Vol. 92, No. 6, 1985, pages 381-390.