Graph theory and rocket: what they have in common

1. Step 1. Graph theory — is used in — Dijkstra’s algorithm. A graph algorithm.
2. Step 2. Dijkstra’s algorithm — is used in — Online maps. Routes.
3. Step 3. Online maps — uses — GPS (satellite navigation). The position.
4. Step 4. GPS (satellite navigation) — is part of — Reusable rocket. Navigation during landing.
5. Step 5. Reusable rocket — has part — Liquid-propellant rocket engine. Liquid-propellant engines.
6. Step 6. Liquid-propellant rocket engine — evolved from — Rocket. Goddard switched to liquid fuel.

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