Theorem: one_add_sq_pos (PrimeNumberTheoremAnd/Wiener.lean)

State before:
n : ℕ
A a b c d u✝ x y t σ' : ℝ
ψ Ψ : ℝ → ℂ
F G : ℂ → ℂ
f : ℕ → ℂ
𝕜 : Type
inst✝ : _root_.RCLike 𝕜
u : ℝ
⊢ 1 ≤ 1 + u ^ 2
Tactic:
simpa using sq_nonneg u
State after:
no goals