Endomorphism/K/Power/Decomposition/Fact/Proof

Proof

This follows directly from

${\phi }^n={({\phi }_{\mathrm{d}\mathrm{i}\mathrm{a}\mathrm{g}}+{\phi }_{\mathrm{n}\mathrm{i}\mathrm{l}})}^n,$

the commuting property, and the general binomial formula.

To fact