
Re: abelian square
Posted:
Sep 8, 2013 10:00 AM


Peter Percival wrote:
> > So, in such an abelian group, abcd.cdba = abcd.abcd, a square. Here . > denotes concatenation, and the identity is demonstrated by applying > association and commutativity repeatedly.
For the sake of consistency, I should have written "associativity and commutativity". I hope I can be forgiven.
 Sorrow in all lands, and grievous omens. Great anger in the dragon of the hills, And silent now the earth's green oracles That will not speak again of innocence. David Sutton  Geomancies

