fact: Definition Qint_to_rat (r : Qint) : rat := (r.1%:Q / (val r.2)%:Q).
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat div seq zmodp) mathcomp(path choice fintype tuple finset bigop order) mathcomp(ssralg ssrint ssrnum rat) CoqEAL(hrel param refinements pos)