fact: Definition Q_4th_root_floor_plain (q: Q): Z := Z_4th_root_floor_plain (Qceiling q).
imports: List NPeano QArith Qabs Qpossec Qsums Qround Qmetric ZArith CRArith CRsum util.Qgcd Program uneven_CRplus stdlib_omissions.P stdlib_omissions.Z stdlib_omissions.Q Coq.ZArith.Zsqrt_compat