Heretic to deny Resurrection?

 Sefer HaIkkarim (01:23) As long as one believes in reward and punishment generally, whether corporeal, in this world, or spiritual, in the world to come, he does not deny a principle of the Law of Moses if he disbelieves in resurrection. Nevertheless it is a dogma accepted by our nation, and every one professing the Law of Moses is obliged to believe it,