A child sits on a swing, feet dangling, perfectly at rest. Give hima gentle push. The child moves forward to a maximum height,reverses course under the influence of gravity, and then swingsback and ...

Citations: Chopra, Sunil. 1994. The Graph Partitioning Polytope on Series-Parallel and 4-Wheel Free Graphs. SIAM Journal on Discrete Mathematics. (1)16-31.