Re: symmetry group

1999-07-23 Thread Jitze Couperus
Mike Stay asked Given a basis for a group, can one calculate in polynomial time how far apart two states are? How about finding a shortest path between two states? Does anyone know good search terms to find papers on this sort of thing? -- Not sure if this is what you are looking for, but

Re: Pop Count Instruction and crytanalysis

1999-01-29 Thread Jitze Couperus
John Young wrote - In it the CDC 7600 is cited as having the pop-count "facility for nuclear physics applications programming, etc." That "etc." is provocative in the light of what Jitze and Steve have written. A correspondent asked me if I could expound some more on what I know about the

Re: Pop Count Instruction and crytanalysis

1999-01-28 Thread Jitze Couperus
ther machines (built after he left Control Data) had such an instruction, but I'm told they did. Jitze Couperus Control Data Systems