The opposite of Recursion is Recursion. The absence of Recursion is Recursion. So the first aspect of Underlying Recursion is Recursion. All aspects relate to a number, a letter, a color, and a planet and a metal where appropriate and several meanings that are aspects of a base meaning.

Recursion is 10, UU, Colorless. It is at the bottommost circle and is the keystone of the Tetractys.