theorem hysteresisWidth_pos {ρ : ℝ} (hρ : ρ < 1) {bf : ℝ} (hbf : 0 < bf) : 0 < hysteresisWidth ρ bf := by simp only [hysteresisWidth] exact mul_pos (by linarith) hbf
thesis/CESProofs/Dynamics/EntryExitDynamics.lean:70
## Entry-Exit Core Definitions (merged from EntryExitDefs.lean)