pith. machine review for the scientific record. sign in
theorem proved term proof

r_ref_exact_pos

show as:
view Lean formalization →

No prose has been written for this declaration yet. The Lean source and graph data below render without it.

generate prose now

formal statement (Lean)

 211theorem r_ref_exact_pos (r target : ℝ) (hr : 0 < r) (ht : 1 < target) :
 212    0 < r_ref_exact r target := by

proof body

Term-mode proof.

 213  unfold r_ref_exact
 214  apply mul_pos hr
 215  apply Real.rpow_pos_of_pos
 216  exact div_pos (by linarith) abs_beta_running_pos
 217
 218/-- For target > 1 + |beta| (i.e., target above the G_ratio at self),
 219    r_ref_exact > r. The reference scale is LARGER than the measurement scale. -/

used by (1)

From the project-wide theorem graph. These declarations reference this one in their body.

depends on (11)

Lean names referenced from this declaration's body.