Recent content by elffry

[SOLVED] Thanks, turns out, I needed to take the hyperbolic cosine of a completely different formula and work from there. Thanks though.

Hi! I'm trying to derive the hyperbolic distance formula for the upper-half plane model. It is given here: http://en.wikipedia.org/wiki/Poincar%C3%A9_half-plane_model" I have the first formula, (ds)2= ... But I can't figure out how they got the distance formula below it. I understand...