Perverse sheaves, Koszul IC-modules, and the quiver for the category O

Petri map for rank two bundles with canonical determinant

Petri map for vector bundles near good bundles

Pfaffian Lines and Vector Bundles on Fano Threefolds of Genus 8

Pfaffian quartic surfaces and representations of Clifford algebras

Pfaffian representations of cubic surfaces

Pfaffian Subschemes

Phases of Lagrangian-invariant objects in the derived category of an abelian variety

PHCpack in Macaulay2

Phi-modules and coefficient spaces

Phylogenetic Algebraic Geometry

Phylogenetic ideals and varieties for the general Markov model

Phylogenetic invariants for group-based models

Phylogenetic toric varieties on graphs

Picard and Chazy solutions to the Painleve' VI equation

Picard group of hypersurfaces in toric 3-folds

Picard group of moduli of hyperelliptic curves

Picard group of the compactified universal Picard stack

Picard group of the moduli spaces of G-bundles

Picard groups of Hilbert schemes of curves