proposition: Lemma nbhs0P (P : set V) x : (\near x, P x) <-> (\forall e \near 0, P (x + e)).
proof: Proof. by rewrite -nbhsDr addr0. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg ssrint ssrnum finmap matrix) mathcomp(rat interval zmodp vector fieldext falgebra) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality set_interval Rstruct) ereal reals signed topology prodnormedzmodule