George Hammond a écrit :
Are you kidding.... nobody but a rank amateur would screw
around with algebraic formulas when adding velocities.
Any expert will tell you all you do to add two velocities
in SR is to

ADD THE RAPIDITIES

Fine. It's exactly what is proven there. I'd guess than no
expert would accept a statement without any proof of it,
wouldn't he ?

STUPID

Nice to meet you.