The Classification of Rank 4 Locally Projective Polytopes and Their Quotients
The classification problem for graphs and lattices is wild
The closed knight tour problem in higher dimensions
The Clustering Coefficient of a Scale-Free Random Graph
The codes and the lattices of Hadamard matrices
The coefficients of a Fibonacci power series
The Coin Exchange Problem and the Structure of Cube Tilings
The Colin de Verdière Graph Parameter for Threshold Graphs
The Colin de Verdière number and graphs of polytopes
The coloring complex and cyclic coloring complex of a complete k-uniform hypergraph
The Coloring Ideal and Coloring Complex of a Graph
The Colourful Feasibility Problem
The Combinatorial Astrology of Rabbi Abraham Ibn Ezra
The combinatorial quantum cohomology ring of $G/B$
The combinatorics of a three-line circulant determinant
The Combinatorics of Al-Salam-Chihara $q$-Laguerre polynomials
The combinatorics of associated Hermite polynomials
The combinatorics of biased riffle shuffles
The combinatorics of frieze patterns and Markoff numbers
The combinatorics of k-marked Durfee symbols