The Lefebvre Equations are a set of mathematical and magical equations related to the study of Runecrafting theory. The equations are some of the central instruments for modern runecrafting study, as when used with Wizard Beenay's theory of light; together, the two can be used to show the signature of an external manifestation of runecrafting energy. The only explicitly known Lefebvre equation is the Lefebvre transformation, which is mentioned by certain members of the Runecrafting Guild when spoken to.