fact: Definition limit_in_point (f : ℕ → X) (a : ℕ) (L : X) := for all ε : R, (ε > 0) ⇒ there exists δ : R, (δ > 0) ∧ (for all n : nat, (0 < |n - a| < δ) ⇒ (dist X (f n) L < ε)).
imports: Coq.Reals.Reals Tactics Automation Libs.Negation Notations