I have only a rudimentary knowledge of the subject and would like more info about: 1) The consequences of faster-than-light speed. I noticed that [tex]\gamma[/tex] would then involve complex numbers, and seeing as complex analysis is definitely more than imaginary, I was wondering what it could mean, both mathematically and physically (wormholes?). Unfortunately, I haven't gone very far into math higher than calculus yet. Hopefully soon to change. 2) [tex]\gamma[/tex] bears more than a passing resemblance to the derivative of arcsin. Details?