Math Wrath

Math Wrath is a perk in Fallout: New Vegas.

Effects
The perk reduces all AP costs by 10 percent. Note that this perk applies across all weapons, but will also stack with weapon-centric V.A.T.S. perks, like Plasma Spaz or Beautiful Beatdown.

Behind the scenes
There is an unused SPEL "PerkMathWrath" that references an otherwise unused MGEF "MathWrathEffect" in the game files, observable through the GECK. These are the editor IDs, but their names are "Math Wrath" and "Regenerate AP" respectively. Based on the PerkMathWrath's use of MathWrathEffect at magnitude 200, at some point of development the Math Wrath perk would have restored 200 AP under some kind of condition.
 * Grim Reaper's Sprint is similar to this concept, but instead uses Entry Point "Player Kill AP Reward" to restore 20 AP if you got any kills in V.A.T.S.