proposition: Lemma Derive_Reals (f : R -> R) (x : R) (pr : derivable_pt f x) : derive_pt f x pr = Derive f x.
proof: Proof. apply sym_eq, is_derive_unique. case: pr => /= l Hf. now apply is_derive_Reals. Qed.
imports: Coq(Reals Psatz ssreflect) Rcomplements Rbar Lim_seq Iter Hierarchy Continuity Equiv