each of which is greater than c/3? can it work?
edit: i mean superposing* in the title
I assume you are referring to the Lorentz transformations. Perhaps if you specified the situation you are thinking of we could be of more help.
Nope … if A thinks B is going north at c/2, and B thinks C is going north at c/2, and C thinks D is going north at c/2, then A still thinks D is going less than c (how much? )
Separate names with a comma.