What is ISGCI?

ISGCI is an encyclopaedia of graphclasses with an accompanying java application that helps you to research what's known about particular graph classes. You can:
  • check the relation between graph classes and get a witness for the result
  • draw clear inclusion diagrams
  • colour these diagrams according to the complexity of selected problems
  • find the P/NP boundary for a problem
  • save your diagrams as Postscript, GraphML or SVG files
  • find references on classes, inclusions and algorithms

Database contents

1440 classes
168733 inclusions
updated 2013-06-17


Latest news

  • 2013-03-13 Added option to show only inclusion minimal/maximal boundary classes in the application.
  • 2013-03-01 Smallgraphs available in graph6 format.
  • 2012-09-08 The ISGCI database is included in Sage.