You mean, more than you

@D.O. Actually, of all the things that are wrong with this "proof", I don't think that's one of them. IIRC, exponentiation is one-to-one, so if exp(-2P)=1=exp(0), then -2P=0.

…hmm, now that I think about it, maybe it's only one-to-one over the reals. So the issue may be more complex than I thought.

]]>[(myl) That's "matrix left divide" in Matlab…]

]]>