proposition: Lemma boundE E : bound E = has_ubound E.
proof: Proof. by apply/eq_exists=> x; rewrite is_upper_boundE. Qed.
imports: Rdefinitions Raxioms RIneq Rbasic_fun Zwf Epsilon FunctionalExtensionality Ranalysis1 Rsqrt_def Rtrigo1 Reals mathcomp(all_ssreflect ssralg poly mxpoly ssrnum) HB(structures) mathcomp(boolp classical_sets) reals