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Top 20 Directory:
Top : Science : Math : Combinatorics : Graph_Theory
  		• Books
  		• Events
  		• Graph Drawing@
  		• Journals@
  		• Open Problems
  		• People
  		• References
  		• Software@
    Sites:
  		• A Constructive Approach to Graph Theory: Notes on a semiotic approach to constructing isomorphism invariants of graphs by John-Tagore Tevet.
  		• A Survey of Distance-Transitive Graphs: By Arjeh M. Cohen.
  		• Capillary Multi-Path Routing in a Network of a Directed Symmetric Graph: By Emin Gabrielyan.
  		• Counting Hamilton Cycles in Product Graphs: By Frans Faase.
  		• Four Colour Theorem: A new proof of the four color theorem by Ashay Dharwadker that uses group theory and Steiner systems.
  		• Fractal Instances of the Traveling Salesman Problem: By Pablo Moscato.
  		• From the Even Cycle Mystery to the L-Matrix Problem and Beyond: By Michael Brundage.
  		• Getgrats: General Theory of Graph Transformation Systems: A research network funded by the European Commission.
  		• Graph Colorings with Local Constraints: A survey by Zsolt Tuza.
  		• Graphnet Archives: Archives of the Graphnet mailing list from February 1990.
  		• Graphs: Theory-Algorithms-Complexity: Resource collection maintained by Thomas Emden-Weinert.
  		• Hamiltonian Circuit Algorithm: A new algorithm for finding Hamiltonian circuits with a constructive proof of Dirac's theorem and applications to finding Knight's Tours by Ashay Dharwadker.
  		• Harmonious Colourings: Notes and bibliography by Keith Edwards.
  		• Knight's Tour Problem: Solution for chess boards with upto 32 squares.
  		• Liquid Schedule Construction Algorithm: An efficient method for coloring a congestion graph by Emin Gabrielyan.
  		• Multicommodity Problems: Instances and random generators of multicommodity flow and network design problems.
  		• Network Resources for Colouring a Graph: Resources for formulating and solving coloring problems.
  		• Other Graph Theory and Related Pages: Miscellaneous pages collected by Stephen C. Locke.
  		• Parameters of Directed Strongly Regular Graphs: Parameters, constructions and nonexistence information for directed strongly regular graphs.
  		• Regular Graphs Page: Tables of simple connected k-regular graphs on n vertices and girth at least g.
  		• Sandpiles in Graphs: An application of cellular automata by Angela R. Kerns.
  		• Signed, Gain and Biased Graphs: List of publications and manuscripts annotated by Thomas Zaslavsky.
  		• Spectral Graph Theory: People, publications, research topics, open problems, events and resources.
  		• The Clique Algorithm: A polynomial-time algorithm for finding maximal cliques in a graph with new bounds on Ramsey numbers by Ashay Dharwadker.
  		• The Four Color Theorem: Computer aided proof of the four color theorem by Neil Robertson, Daniel P. Sanders, Paul Seymour and Robin Thomas.
  		• The Hamiltonian Page: Hamiltonian cycle and path problems, their generalisations and variations.
  		• The Independent Set Algorithm: A polynomial-time algorithm for finding maximal independent sets in a graph with new bounds on Ramsey numbers by Ashay Dharwadker.
  		• The Vertex Coloring Algorithm: A polynomial-time algorithm for coloring the vertices of a graph with a new constructive proof of Brooks' theorem by Ashay Dharwadker.
  		• The Vertex Cover Algorithm: A polynomial-time algorithm for finding minimal vertex covers in a graph by Ashay Dharwadker.
  		• Thrackles: Jon Perry's pages on the thrackle conjecture.
  		• Traveling Salesman Problem: These pages report the history of the TSP and ongoing work to solve large instances.
  		• TSP Generator: Generates a Traveling Salesman Problem map and data for a given set of US cities.
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