fact: Definition qzt_fit t := qzt_fita && qzt_fitl (qzt_get3 ax1 ax2 ax3 t).
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype path fingraph) fourcolor(hypermap geometry color coloring quiz cfmap) fourcolor(cfquiz cfreducible)