fact: CoInductive F2_spec : 'F_2 -> bool -> bool -> Prop := | F2_0 : F2_spec 0 true false | F2_1 : F2_spec 1 false true.
imports: mathcomp(all_ssreflect fingroup perm ssralg zmodp) mathcomp(matrix mxalgebra poly polydiv mxpoly)