fact: Definition VVcontinuity_pt (f : V -> V) (K : V -> Prop) (open : Open_space K) (x : V) := K x -> forall eps : R, eps > 0 -> {alp : R | alp > 0 /\ (forall y, K y -> N (vsub x y) <= alp -> N (vsub (f y) (f x)) <= eps)}.
imports: Reals integrales