Purely transmitting integrable defects

Purely twistorial string with canonical twistor field quantization

Pursuing Gravitational S-Duality

Push on a Casimir apparatus in a weak gravitational field

Putting an Edge to the Poisson Bracket

Putting Liouville String Models of (Quantum) Gravity to Test

Putting String Duality to Work

Putting String/Fivebrane Duality to the Test

Putting string/string duality to the test

Puzzles and Paradoxes About Holography

Puzzles at Large N

Puzzles for Matrix Models of Chiral Field Theories

Puzzles on the Duality between Heterotic and Type IIA Strings

Puzzles with Tachyon in SSFT and Cosmological Applications

Pyrotechnic Universe

Pythagoras' Theorem on a 2D-Lattice from a "Natural" Dirac Operator and Connes' Distance Formula