theorem qFriction_measurement_formula (T Cov Response : ℝ) (hR : Response ≠ 0)
(hFDT : Response = Cov / T) (hT : T ≠ 0) :
T = Cov / Response := by
have h : Response * T = Cov := by
field_simp at hFDT
linarith
field_simp
linarithTheorems 5-7, Corollaries 2-4, Propositions 8-11: