04/18/2010, 11:10 PM

(04/18/2010, 01:17 PM)bo198214 Wrote: Did we mention already the tangent? It has this nice addition theorem:

which brings us the superfunction:

for the function

is another particular case of a linear fraction (where the regular iteration at both fixed points coincide).

The two (non-real) fixed points are:

,

for

i cant help to say that this is the velocity addition formula in relativity with lightspeed = 1.

tan(x) = u , tan(y) = v

tan(x+y) = (u + v)/(1 - uv).

an intresting connection.

well at least a pretty one.

tommy1729