9 Jul
2006
9 Jul
'06
6:45 a.m.
On 7/7/06, Schroeppel, Richard <rschroe@sandia.gov> wrote:
Has the diameter of the Rubik's cube puzzle been established yet?
... Later a number of variations on the original 3x3x3 puzzle appeared, including 4x4x4, 5x5x5, and 2x2x2. It must be quite easy to find the diameter of the last example --- does anybody know what it is? Another of Rubik's puzzles involved a rectangle comprising 3x2 square pieces, looped together by an elastic cord following a cyclically diagonal path in such a manner that the pieces could flip individually. I can't now recall the name; only my utter failure to model the symmetries of the wretched thing mathematically. Fred Lunnon