`BookProof.ChapterLorentzTranslation.properTime_add` (w : Fin 3 → ℝ) (x0 y0 : ℝ) (xs ys : Fin 3 → ℝ) : properTime w (x0 + y0) (xs + ys) = properTime w x0 xs + properTime w y0 ys

Initializing...

`BookProof.ChapterLorentzTranslation.properTime_add` (w : Fin 3 → ℝ) (x0 y0 : ℝ) (xs ys : Fin 3 → ℝ) : properTime w (x0 + y0) (xs + ys) = properTime w x0 xs + properTime w y0 ys · Prove2Me