fact: Definition limit_in_point (f : R → R) (a : R) (q : R) := for all ε : R, (ε > 0) ⇒ there exists δ : R, (δ > 0) ∧ (for all x : R, (0 < |x - a| < δ) ⇒ (|(f x) - q| < ε)).
imports: Coq.Reals.Reals Notations Tactics Waterproof.Automation