theorem entryTimescale_pos {lambda lf : ℝ} (hlam : 0 < lambda) (hlf : 0 < lf) : 0 < entryTimescale lambda lf := by simp only [entryTimescale] exact div_pos hlf hlam
thesis/CESProofs/Dynamics/EntryExitDynamics.lean:237
## Entry-Exit Dynamics