It just says that if each permutation (of axes) in P gives the identity on A, then any composition of those permutations also gives the identity.
Marshall On Mon, Oct 10, 2011 at 4:49 PM, Brian Schott <schott.br...@gmail.com>wrote: > I enjoyed the Essay and went on to view the embedded Essay here which > was fascinating, also. > > http://www.jsoftware.com/jwiki/Essays/Symmetric%20Array > > However, I could not follow one step of the Symmetric Array Essay. > > " > and so on; similarly, if P (] -: |:)"1 _ A , then > A -: p0|:p2|:p1|:A > A -: p0|:p4|:p2|:p0|:p7|:p2|:A > for all sequences from the set of permutations P . > " > > I assume the p0, p2, ... are permutation vectors of P, but that's as > far as I can get. > > > > On Mon, Oct 10, 2011 at 12:59 AM, Roger Hui <rhui...@shaw.ca> wrote: > > http://www.jsoftware.com/jwiki/Essays/Reflexive > > > > -- > (B=) > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
