Combinatorics Problems (Popularity: )

Combinatorics problems selected from math olympiads.

Open Problems for Undergraduates (Popularity: )

A collection of open problems in Discrete Mathematics which are currently being researched by members ...

Problem Collection in Combinatorial Optimization (Popularity: )

Maintained by the EGRES group. HTML/LaTeX/text format.

Open Problems in Combinatorics (Popularity: )

Features links to newsletters, workshops, and papers.

Past Open Problems (Popularity: )

From the SIAM Activity Group Newsletter in Discrete Mathematics. In PostScript. Compiled by Douglas B. ...

Problems in Graph Theory and Combinatorics (Popularity: )

A collection maintained by Douglas B. West, of the University of Illinois. Features brief introductions, ...

Some Problems in Matroid Theory (Popularity: )

Thomas Zaslavsky of Binghamton State University of New York presents brief descriptions and references. Find ...