Graph theory involves the study of the properties of graphs and their relationships, used in complexity and network theory. Mathematical calculations of graphs are based on algorithms.
 
 
Recommended Resources
GTA is a research center within the School of Electrical Engineering and Computer Science in the Faculty of Engineering and the Built Environment, at the University of Newcastle. Its site provides an overview to graph theory and its applications, intended to explore aspects of research into the theory nod application of combinatorics and graph theory. A supporting wiki is included.
http://www.graphtheorygroup.com/
Graph Theory Textbooks and Resources
Sponsored by the mathematical textbooks of Professor Jonathan Gross of Columbia University, this site focuses on comprehensive graph theory resources maintained by Daniel Sanders, Apart from the ability to order the books through the site, additional graph theory resources are available.
http://www.graphtheory.com/
Reinhard Diestel: Graph Theory
A graduate text in mathematics, biographical information about the author and reviews of his book are available here. Published editions of the text may be ordered or a free searchable and linked electronic edition is available for online browsing.
http://www.diestel-graph-theory.com/