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Fill polynomial evaluation norm step in Chapter 06 #137

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Fill polynomial evaluation norm step in Chapter 06 #137

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2 changes: 1 addition & 1 deletion FormalBook/Chapter_06.lean
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Expand Up @@ -75,7 +75,7 @@ theorem h_lamb_gt_q_sub_one (q n : ℕ) (lamb : ℂ):
have h_ineq :
‖((X - C lamb).eval (q : ℂ))‖^2 > ((q : ℝ) - 1)^2 := by
calc
_ = ‖q - lamb‖^2 := by sorry
_ = ‖q - lamb‖^2 := by simp
--simp only [eval_sub, eval_X, eval_C, norm_eq_abs]
_ = ‖(q : ℂ) - a - I*b‖^2 := by sorry
_ = ‖(q : ℂ) - a‖^2 + ‖b‖^2 := by sorry
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