Particles with negative energies in black holes

Partition Function for (2+1)-Dimensional Einstein Gravity

Partition Function of Spacetime

Partition Function of the Schwarzschild Black Hole

Pass-through Mach-Zehnder topologies for macroscopic quantum measurements

Passage of radiation through wormholes

Passage of radiation through wormholes and formation of black holes

Passage of Time in a Planck Scale Rooted Local Inertial Structure

Passing to an effective 4D phantom cosmology from 5D vacuum theory of gravity

Past and future gauge in numerical relativity

Past and Future of Cosmic Topology

Past horizons in D-dimensional Robinson-Trautman spacetimes

Past horizons in Robinson-Trautman spacetimes with a cosmological constant

Past singularities in phantom theories

Patch dualities and remarks on nonstandard cosmologies

Patching up the No-Boundary Proposal with virtual Euclidean wormholes

Path and Path Deviation Equations for p-branes

Path and Path Deviation Equations in Kaluza-Klein Type Theories

Path Deviation Equations in AP-Geometry

Path Group in gauge theory and gravity