Hello again, To my understanding an example of the usual representation of a permutation is 3 2 4 1, meaning the permutation takes 3 to 1, 2 to 2, 4 to 3 and 1 to 4. The inverse is 4 2 1 3. OK?
In J, what is a function producing the inverse of a permutation? what is a function composing two permutations into one? Thanks, ... Peter E. -- https://en.wikibooks.org/wiki/Medical_Machines Tel: +1 604 670 0140 Bcc: peter at easthope. ca ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
