PvcGuide.com

Problems in Signed, Gain, and Biased Graphs
Compiled by Thomas Zaslavsky.
www.math.binghamton.edu/

Perfect Problems
Unsolved problems on perfect graphs.
www.cs.concordia.ca/

Unsolved Problems and Conjectures
Regarding equal sums of like powers, compiled by Chen Shuwen.
euler.free.fr/

Unsolved Problems in Function Theory
Notes by Alexandre Eremenko.
www.math.purdue.edu/

Unsolved Problems and Rewards
By Clark Kimberling. Offers prizes for solutions of some problems in number theory.
faculty.evansville.edu/

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

Some Problems in Matroid Theory
Thomas Zaslavsky of Binghamton State University of New York presents brief descriptions and references. Find information on Bonin's Projective Bound including the maximum r-flat, covering and packing by flats.
www.math.binghamton.edu/

Unsolved Mathematics Problems
Compiled by Steven Finch. Descriptions of some unsolved problems and numerous links to other collections.
www.mathsoft.com/

Favorite Unsolved Problems
Alexandre Eremenko (Purdue University). Mainly in analysis.
www.math.purdue.edu/

Herbal Remedies for Behavior Problems
An article from the International Veterinary Information Service discusses the evidence for using herbs, flower essences and homeopathic medicine.
www.ivis.org/