dm³ Contact Flow · Helix Γ on r=1 · ε=2
← Vol. IV
α = dz − r² dθ
ṙ = r(1−r²) + ε(r−1)e−z
θ̇ = 1,  ż = r² − ε(r−1)²e−z
r(t)—
z(t)—
|r−1|—
μ̂—
frame0
Γ — Reeb helix on r=1
r(0) > 1 — converging to Γ*
r(0) < r* — escaping (z → −∞)
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