In sci.physics.relativity, YBM

wrote
on Wed, 30 Apr 2008 16:43:25 +0200
:
The following describes a very elegant and simple derivation of the relativistic
formula for the addition of velocities, w = (u+v)/(1 + uv/c^2).

It is due to David Mermin.

See:
http://dorigo.wordpress.com/2008/04/...ivistic-train/

An interesting and elegant derivation; my hat off to
the author. It also of course corroborates exactly with
the derivation done using the Lorentz (which I for one
have done previously).

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