End circle_continuity.
Section Neutral.
Context `{TnEQD:Tarski_neutral_dimensionless_with_decidable_point_equality}.
Global Instance Euclid_neutral_follows_from_Tarski_neutral : euclidean_neutral.

Lemma eOnCirc_OnCirc : forall A K, euclidean_axioms.OnCirc A K -> OnCirc A K.