User blog:Alemagno12/A formalization for Username5243's pi function (NO TRANSFINITE FSES)

First, some preparations:
 * ω = Ω0
 * cof(0) = 0
 * cof(1) = 0
 * cof(x) = 0: cof(Ωx) = Ωx
 * cof(x) > 0: cof(Ωx) = cof(x)
 * b > 0: cof(a+b) = b
 * [WIP]