proposition: Corollary burnside_app_iso_2_4col: square_coloring_number8 4 = 55.
proof: Proof. by apply/eqP; rewrite -(@eqn_pmul2r 8) // burnside_app_iso. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq div) mathcomp(choice fintype tuple finfun bigop finset fingroup) mathcomp(action perm primitive_action)