fact: Record ucycle_plain_quasicubic : Prop := UcyclePlainQuasicubic { ucycle_plain_quasicubic_base :> plain_quasicubic; ucycle_plain_quasicubic_is_ucycle :> ufcycle node r }.
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype path fingraph) fourcolor(hypermap jordan)