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theorem proved tactic proof

E_PBM_is_rung_6

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formal statement (Lean)

 112theorem E_PBM_is_rung_6 : E_PBM = phi_energy_rung 6 := by

proof body

Tactic-mode proof.

 113  unfold E_PBM phi_energy_rung E_base
 114  have key : phi ^ (-(5 : ℝ)) * phi ^ (6 : ℝ) = phi := by
 115    rw [← Real.rpow_add phi_pos,
 116        (by norm_num : (-(5 : ℝ) + (6 : ℝ) : ℝ) = (1 : ℝ)),
 117        Real.rpow_one]
 118  have h : phi ^ (-(5 : ℝ)) * eV_to_J * phi ^ (6 : ℝ) = phi * eV_to_J := by
 119    calc phi ^ (-(5 : ℝ)) * eV_to_J * phi ^ (6 : ℝ)
 120        = phi ^ (-(5 : ℝ)) * phi ^ (6 : ℝ) * eV_to_J := by ring
 121      _ = phi * eV_to_J := by rw [key]
 122  exact h.symm
 123
 124/-- Division bounds helper: transfers E_PBM bounds to any positive numerator. -/

depends on (4)

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