Hi, I just noticed your comment on the Math Desk: "This is the peril of coming into maths from a physics/engineering background - not so hot on rings, fields etc..." I am currently facing the reverse problem, knowing all about the rings/fields but trying to develop physical intuition :) Drop me a line anytime if there is something we can discuss. Rschwieb (talk) 18:39, 26 March 2012 (UTC)