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theorem proved term proof

extremum_condition

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formal statement (Lean)

 156theorem extremum_condition : J_curv lambda_rec_from_Jbit = J_bit_val := by

proof body

Term-mode proof.

 157  unfold J_curv lambda_rec_from_Jbit
 158  have h : J_bit_val / 2 ≥ 0 := le_of_lt (div_pos J_bit_pos (by norm_num))
 159  rw [sq_sqrt h]
 160  ring
 161
 162/-- The extremum is unique: if J_curv(λ) = J_bit for λ > 0, then λ = λ_rec_from_Jbit. -/

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