proposition: Lemma differentiableX (f : V -> R) n x : differentiable f x -> differentiable (f ^+ n.+1) x.
proof: Proof. by move=> /differentiableP. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg ssrnum matrix interval) mathcomp(mathcomp_extra boolp classical_sets functions) reals signed topology prodnormedzmodule normedtype landau forms