Orbits: 0
Points: 0
Poincaré section
Record (θ₂,ω₂) when θ₁=0⁺
Regular orbit: closed curve (KAM torus)
Chaotic orbit: scattered points filling a region
Low energy → regular
High energy → chaos
Record (θ₂,ω₂) when θ₁=0⁺
Regular orbit: closed curve (KAM torus)
Chaotic orbit: scattered points filling a region
Low energy → regular
High energy → chaos