Open Problems

Graph Coloring Problems - Archive for the book "Graph Coloring Problems" by Tommy R. Jensen and Bjarne Toft (Wiley Interscience 1995), dedicated to Paul Erdös. Gives progress and new problems.
www.imada.sdu.dk/Research/Graphcol/

Graph Theory Open Problems - Six problems suitable for undergraduate research projects.
dimacs.rutgers.edu/~hochberg/undopen/graphtheory/graphtheory.html

Open Problems in Graph Algorithms - Compiled by Jerry Spinrad.
www.vuse.vanderbilt.edu/~spin/open.html

Past Open Problems Columns - By Douglas B. West, from the SIAM Activity Group Newsletter in Discrete Mathematics.
www.math.uiuc.edu/~west/pcol/pcolink.html

Perfect Graphs - Conjectures and open problems, maintained at the AIM.
www.aimath.org/WWN/perfectgraph/

Perfect Problems - Unsolved problems on perfect graphs.
www.cs.concordia.ca/~chvatal/perfect/problems.html

Problems in Graph Theory - Maintained by Peter Cameron.
www.maths.qmw.ac.uk/~pjc/oldprob.html

Problems in Signed, Gain, and Biased Graphs - Compiled by Thomas Zaslavsky.
www.math.binghamton.edu/zaslav/Bsg/sgbgprobs.html

Problems in Topological Graph Theory - Web text by Dan Archdeacon with a list of open questions in topological graph theory.
www.emba.uvm.edu/~archdeac/newlist/problems.html

Some Open Problems - Open problems and conjectures concerning the determination of properties of families of graphs.
www.eecs.umich.edu/~qstout/constantques.html

Some Open Problems - Kézdy's open problems.
www.louisville.edu/~aekezd01/open/open.html

Three for the Money: The Degree/Diameter Problem - Students can understand and work on an unsolved problem in mathematics.
www.c3.lanl.gov/mega-math/workbk/graph/grthree.html

Unsolved Problems - Including the list of 50 problems of Bondy and Murty with current status. Compiled by Stephen C. Locke.
www.math.fau.edu/locke/unsolved.htm