proposition: Lemma minNye : left_zero (-oo : \bar R) mine.
proof: Proof. by move=> x; have [|//] := leP x -oo; rewrite leeNy_eq => /eqP. Qed.
imports: HB(structures) mathcomp(all_ssreflect all_algebra finmap) mathcomp(mathcomp_extra) signed