The Shape of Unlabeled Rooted Random Trees
The Shard Intersection Order on Permutations
The Shi arrangement and the Ish arrangement
The Shi arrangement of the type $D_\ell$
The Shi arrangements and the Bernoulli polynomials
The shifted plactic monoid
The short toric polynomial
The shortest game of Chinese Checkers and related problems
The sigma-sequence and counting occurrences of some patterns, subsequences and subwords
The signed Eulerian numbers on involutions
The simple random walk and max-degree walk on a directed graph
The Simplex Algorithm in Dimension Three
The size of a hypergraph and its matching number
The size of bipartite graphs with girth eight
The size of maximal systems of brick islands
The size of the biggest Caterpillar subtree in binary rooted planar trees
The size of the smallest uniquely completable set in order 8 Latin squares
The size Ramsey number of a directed path
The sizes of the intersection of two unitals in PG$(2,q^2)$
The skew diagram poset and components of skew characters