The eMath Equation

Gifted to Kirk Weiler by some of the elder gods of the omniverse, the eMath Equation allows Kirk to control the omniverse itself, from huge feats such as creating gates and traveling through the universe, to the subtle manipulation of the minds of other humans. It is rumored that it was through this Equation that his series of instruction videos became so widespread.

Post-TDMD
When Kirk fled Earth to the Forbidden Zone after the Day the Math Died, he was imprisoned in a pocket dimension where the laws of math do not apply, nullifying the power of the Equation. Kirk eventually found a loophole in the equation that allowed him to escape the zone.