Permutations Which Make Transitive Groups Primitive

Permutations with Ascending and Descending Blocks

Permutations with Extremal number of Fixed Points

Permutations with restricted patterns and Dyck paths

Permutations without long decreasing subsequences and random matrices

Permutations, cycles, and the pattern 2-13

Permutohedra, associahedra, and beyond

Perpendicular dissections of space

Perturbation of matrices and non-negative rank with a view toward statistical models

Perturbation of transportation polytopes

Pfaffian and hafnian identities in shuffle algebras

Pfaffian Circuits

Pfaffian decomposition and a Pfaffian analogue of q-Catalan Hankel determinants

Pfaffian L-ensembles related to the z-measures on partitions with the Jack parameters 1/2 or 2

Pfaffians and Representations of the Symmetric Group

Phase transitions for modified Erdös-Rényi processes

Phylogenetic networks form partial trees

Pieri operators on the affine nilCoxeter algebra

Pieri's Formula for Generalized Schur Polynomials

Piles of Cubes, Monotone Path Polytopes and Hyperplane Arrangements