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Circuit

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Math for Non-Math Majors

Definition

A circuit in graph theory is a path that starts and ends at the same vertex with no other repeated vertices. It is a closed loop in a graph where each edge is used exactly once.

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5 Must Know Facts For Your Next Test

  1. A circuit must start and end at the same vertex.
  2. No vertices, except for the starting/ending vertex, can be repeated in a circuit.
  3. Every edge in a circuit is unique and used only once.
  4. A circuit with all vertices included exactly once is called a Hamiltonian circuit.
  5. Eulerian circuits traverse every edge of the graph exactly once without repetition.

Review Questions

  • What distinguishes a circuit from other types of paths in a graph?
  • Can a circuit contain repeated vertices? Why or why not?
  • Explain the difference between an Eulerian circuit and a Hamiltonian circuit.
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