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Fleury's algorithm (Algorithm)

Fleury's algorithm constructs an Euler circuit in a graph (if it's possible).

  1. Pick any vertex to start
  2. From that vertex pick an edge to traverse, considering following rule: never cross a bridge of the reduced graph unless there is no other choice
  3. Darken that edge, as a reminder that you can't traverse it again
  4. Travel that edge, coming to the next vertex
  5. Repeat 2-4 until all edges have been traversed, and you are back at the starting vertex
By ``reduced graph'' we mean the original graph minus the darkened (already used) edges.




"Fleury's algorithm" is owned by mathcam. [ full author list (2) | owner history (1) ]
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See Also: Euler circuit

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Cross-references: mean, reduced, bridge, edge, vertex, graph, Euler circuit
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This is version 6 of Fleury's algorithm, born on 2003-04-24, modified 2005-04-14.
Object id is 4210, canonical name is FleurysAlgorithm.
Accessed 20125 times total.

Classification:
AMS MSC05C45 (Combinatorics :: Graph theory :: Eulerian and Hamiltonian graphs)

Pending Errata and Addenda
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