theorem
proved
term proof
reductionFactor_band
show as:
view Lean formalization →
formal statement (Lean)
43theorem reductionFactor_band :
44 (0.87 : ℝ) < reductionFactor ∧ reductionFactor < 0.89 := by
proof body
Term-mode proof.
45 unfold reductionFactor
46 have h1 := phi_gt_onePointSixOne
47 have h2 := phi_lt_onePointSixTwo
48 refine ⟨by linarith, by linarith⟩
49
50/-! ## §2. Residual fraction after n cycles -/
51
52/-- Residual contaminant fraction after `n` cycles. -/