[maxwell]

MUUUUUHAHAHAHAHAHA! You ASKED!

An invariant is a quantity that doesn't change from situation to situation, for example, the energy equation from relativity theory E^2 = (E_0)^2 + (cp)^2 is invariant among reference frames.

My old undergrad prof who taught us intro to quantum mechanics used to say that-- "When in doubt, use the invariant."

[xsmommy]

if i applied myself i figure i would be good at that kind of crap again, but i am too lazy to do more than read a brief or a case or a gardening mag....