The cluster basis of .
The combinatorial structure of trigonometry.
The combinatorialization of linear recurrences.
The combinatorics of certain -ary meta-Fibonacci sequences.
The combinatorics of the Al-Salam-Chihara -Charlier polynomials.
The combinatorics of the Garsia-Haiman modules for hook shapes.
The complete polynomial grid
The complexity of retina operators.
The concept of Bailey chains.
The cube polynomial and its derivatives: The case of median graphs.
The cube recurrence.
The cyclic sieving phenomenon for faces of cyclic polytopes.
The cyclotomic identity and the cyclic group.
The derangement problem relative to the Mahonian process.
The descent set and connectivity set of a permutation.
The Different Ways of Stabbing Disjoint Convex Sets.
The dimer problem for narrow rectangular arrays: A unified method of solution, and some extensions.
The dinner table problem: the rectangular case.
The distribution of descents and length in a Coxeter group.
The Ehrhart polynomial of a lattice -simplex.