fact: Record fragment_demo := FragmentDemo { fd_trees L u :> (u \in Fs) -> (L \in S) -> { G : rGraph clause | fragment G u L }; fd_sub : {subset S <= T}; fd_lcons C : C \in T -> lcons C }.
imports: mathcomp.ssreflect.ssreflect mathcomp(all_ssreflect) CompDecModal.libs(edone bcase fset base sltype) CompDecModal.CTL(CTL_def dags)