Order and disorder in energy minimization

Orthocentric simplices and their centers

Orthologic Tetrahedra with Intersecting Edges

Oscillation of Urysohn type spaces

Oscillatory motion of drainage divides

Packing points into a unit cube in higher space

Packing-constrained point coverings

Pareto Optimality and Isoperimetry

Partially Paradoxist Smarandache Geometries

Pathwidth, trees, and random embeddings

Perfect Delaunay Polytopes in Low Dimensions

Perfect, strongly eutactic lattices are periodic extreme

Periodic body-and-bar frameworks

Periodic Planar Disk Packings

Periodicity and Circle Packing in the Hyperbolic Plane

Perturbation of self-similar sets and some regular configurations and comparison of fractals

Perturbations of discrete lattices and almost periodic sets

Petrie-Coxeter Maps Revisited

Phase retrieval for characteristic functions of convex bodies and reconstruction from covariograms

Photoelectric polarization maps of two bipolar reflection nebulae