theorem kramersRate_pos {ℓ ω₀ ω_b ΔΦ T : ℝ}
(hℓ : 0 < ℓ) (hω₀ : 0 < ω₀) (hω_b : 0 < ω_b) :
0 < kramersRate ℓ ω₀ ω_b ΔΦ T := by
unfold kramersRate
apply mul_pos
· exact div_pos (mul_pos (mul_pos hℓ hω₀) hω_b)
(mul_pos (by norm_num) Real.pi_pos)
· exact Real.exp_pos _### Kramers Escape Rate