Date: 31 Aug 1982 1022-PDT From: ISAACS at SRI-KL Subject: re:hypermove lower bounds To: Hoey at CMU-10A cc: cube-lovers at MIT-MC, isaacs at SRI-KL Dan: Could you explain to me how you got the formula of you message of 23 Aug. I can see more-or-less what you're doing, but I haven't been able to parse the formula. Also, I haven't seen your notation before. I take it that "U3" is equivalent to "D1'", except hold the D1 in place. How do you represent half twists? Only by two quarters, or is there a shorthand? From a group theory perspective, is it easier to talk about hypermoves than slice moves? Will that also be true on the 5^3, 6^3, etc?