fact: Definition Rinv_quot (x : R) (xnz : sum (x < IQR 0) (IQR 0 < x)) := Rinv x.
imports: QArith_base Rdefinitions Raxioms ConstructiveReals ConstructiveCauchyReals ConstructiveCauchyRealsMult ConstructiveRcomplete ConstructiveCauchyAbs ConstructiveRealsMorphisms