fact: Definition Rhull (X : set R) : interval R := Interval (if `[< has_lbound X >] then BSide `[< X (inf X) >] (inf X) else BInfty _ true) (if `[< has_ubound X >] then BSide (~~ `[< X (sup X) >]) (sup X) else BInfty _ false).
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