definability
case hP
M : Type u_1
inst✝⁵ : Zero M
inst✝⁴ : One M
inst✝³ : Add M
inst✝² : Mul M
inst✝¹ : LT M
inst✝ : M ⊧ₘ* 𝐈𝚫₀
⊢ 𝚺₀-Predicate fun {a} => Pow2 a → ∃ b ≤ a, a = b ^ 2 ∨ a = 2 * b ^ 2
no goals