theorem
proved
term proof
phi_power_compose
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formal statement (Lean)
271theorem phi_power_compose (a b : ℤ) :
272 PhiForcing.φ ^ a * PhiForcing.φ ^ b = PhiForcing.φ ^ (a + b) :=
proof body
Term-mode proof.
273 (zpow_add₀ PhiForcing.phi_pos.ne' a b).symm
274