Counting unlabelled topologies and transitive relations.
Counting unrooted maps using tree-decomposition.
Counting upper interactions in Dyck paths.
Counting walks in a quadrant: a unified approach via boundary value problems
The aim of this article is to introduce a unified method to obtain explicit integral representations of the trivariate generating function counting the walks with small steps which are confined to a quarter plane. For many models, this yields for the first time an explicit expression of the counting generating function. Moreover, the nature of the integrand of the integral formulations is shown to be directly dependent on the finiteness of a naturally attached group of birational transformations...
Counting with groups and rings.
Counting words by number of occurrences of some patterns.
Counting Young tableaux of bounded height.
Coupon collecting with quotas.
Coûts moyens de circuits hamiltoniens de de
Cover matrices of posets and their spectra
We analyze the spectra of the cover matrix of a given poset. Some consequences on the multiplicities are provided.
Covering a Square by Small Perimeter Rectangles.
Covering and packing in graphs. III: Cyclic and acyclic invariants
Covering energy of posets and its bounds
The concept of covering energy of a poset is known and its McClelland type bounds are available in the literature. In this paper, we establish formulas for the covering energy of a crown with elements and a fence with elements. A lower bound for the largest eigenvalue of a poset is established. Using this lower bound, we improve the McClelland type bounds for the covering energy for some special classes of posets.
Covering graphs and subdirect decompositions of partially ordered sets
Covering Sets by Subsets.
Covering the Plane with Convex Polygons.
Covering with rectangular pieces.
Coverings, heat kernels and spanning trees.
Coverings, Laplacians, and heat kernels of directed graphs.
Coverings Sets for Plane Lattices.