| p~ (defined in notations of fundamental concepts in physics) |
| P_k] (defined in canonical commutation and anti-commutation relations: their representations) |
| $p-adic$ measure (defined in Nicolae Popescu) |
| Palade (defined in George Palade) |
| papilloma virus (defined in Fluorescence cross-correlation spectroscopy (FCCS)) |
| papilloma virus detection (defined in Fluorescence cross-correlation spectroscopy (FCCS)) |
| paracrystal scattering and diffraction (defined in Bessel functions: applications to diffraction by helical structures) |
| paragroups (=groupoids topic) |
| parameter |
| parameter-dependent family of groupoids (defined in variable groupoid) |
| parameter-dependent topology (=variable topology) |
| parametric operator |
| parity (defined in examples of constants of the motion) |
| partial differential equations (defined in differential equations) |
| partial function (defined in relation theory) |
| partial multiplication law (defined in category theory) |
| partial pressure (defined in Dalton's law) |
| particle accelerator (defined in large hadron collider) |
| particle physics (defined in High energy physics) |
| particle physics (=High energy physics) |
| particle scattering (defined in Atomic and nuclear structure) |
| partons (defined in gluons, quarks and QCD) |
| Pascal (defined in topic on computational physics) |
| path independence of work |
| Pauli exclusion principle |
| P-brane (defined in M-theory) |
| pdf (defined in probability distribution functions in physics) |
| PDP (defined in plasma) |
| penny falling from Empire State Building |
| periodic functions, examples of |
| PET (defined in Atomic and nuclear structure) |
| phase factor (defined in algebraic quantum field theories (AQFT)) |
| phenomenological Bloch equations (defined in Felix Bloch) |
| \phi (defined in notations of fundamental concepts in physics) |
| phonons (defined in Quantum topological order and extended quantum symmetries) |
| phonons (defined in Quantum topological order and extended quantum symmetries) |
| photoelectric effect |
| physical axiom or postulate (defined in algebraic quantum field theories (AQFT)) |
| physical law (defined in physical laws) |
| physical laws |
| physical mathematics (=mathematical physics) |
| physical mathematics (defined in fusion of theoretical physics with mathematics at IHES org) |
| physical mathematics (defined in topic on applied mathematical physics and physical mathematics) |
| Physical Meaning of Geometrical Propositions |
| physical Universe (defined in Universe) |
| physics applications (=applied physics) |
| physics area topics (defined in overview of the content of PlanetPhysics) |
| Physics axioms (defined in Fundamental physical concepts) |
| physics axioms (=Axioms of Physics) |
| physics axioms (defined in Axioms of Physics) |
| Physics news |
| piecewise linear (defined in geometrically defined double groupoid with connection) |
| pi-mesons (defined in gluons, quarks and QCD) |
| pions (defined in Elementary particles topic) |
| Planck's equation (defined in spectroscopy topics) |
| Planck's law (=Planck's radiation law) |
| Planck's radiation law |
| PlanetPhysics.org exchange with Wikipedia (defined in topic entry on Wikipedia physics & mathematics entries and exchange projects) |
| PlanetPhysics.org style guideline summary |
| plasma |
| plasma display panel (defined in plasma) |
| plasma electron (defined in non-linear electron excitation of plasma waves) |
| plasma heating (defined in plasma) |
| plasma ion temperature (defined in non-linear electron excitation of plasma waves) |
| plasma wave excitation (defined in non-linear electron excitation of plasma waves) |
| PM website on Wikipedia (defined in topic entry on Wikipedia physics & mathematics entries and exchange projects) |
| Poincare' conjecture (defined in geometrization conjecture and theorem) |
| Poincar\'e group (defined in algebraic quantum field theories (AQFT)) |
| Poincare transformations group (defined in Axioms of Physics) |
| Poincare' transformations group (defined in Fundamental physical concepts) |
| point particle (defined in center of mass) |
| Poisson algebra (defined in Poisson ring) |
| Poisson distribution (defined in probability distribution functions in physics) |
| Poisson euations (defined in spectroscopy topics) |
| Poisson ring |
| Poisson transformation (defined in quantum symmetry) |
| polar coordinate motion example of generalized coordinates |
| polarizability (defined in spectroscopy topics) |
| Polarization (defined in spectroscopy topics) |
| Polish group |
| Polish group (defined in Borel G-space) |
| Polish G-space |
| Polish space with group structure (=Polish group) |
| Polish topology (defined in Borel G-space) |
| position |
| position vector |
| positive proposition (defined in differential propositional calculus) |
| positron annihilation (defined in Atomic and nuclear structure) |
| positron emission (defined in Atomic and nuclear structure) |
| potential of spherical shell |
| power |
| power function (defined in growth of exponential function) |
| Poynting vector (defined in spectroscopy topics) |
| preadditive functor |
| precise idea (=general definition) |
| predicate (=boolean-valued function) |
| Preface: An Elementary Treatise On Quaternions |
| Preface to the Second Edition: An Elementary Treatise On Quaternions |
| prefunction (defined in relation theory) |
| Preliminary definitions and general notions |
| preservation properties (defined in Table of categories and functor properties) |
| presheaf (defined in Functorial Algebraic Geometry and Physics) |
| principle of constancy of light speed (defined in physical laws) |
| Principle of Corresponding States (defined in physical laws) |
| Principle of Indetermination (=uncertainty by waves) |
| principle of minimum action (=Fermat's principle) |
| Principle of the communication of heat |
| principles of NIR spectroscopy |
| principles of quantum physics |
| principles of thermodynamics |
| probability distribution function (defined in probability distribution functions in physics) |
| probability distribution functions in physics |
| probability measure (defined in probability distribution functions in physics) |
| program (defined in supercomputers) |
| program (defined in computer) |
| program |
| programmed automaton (=computer) |
| programmed sequential machine (=computer) |
| programming (=topic on computer programming) |
| programming language (defined in program) |
| programming language (defined in topic on computational physics) |
| projected motion (defined in ballistics (2D)) |
| projectile motion |
| projective object |
| proper generator in a Grothendieck category |
| proper generator theorem |
| properties of commutators (=commutator algebra) |
| proposition (=boolean-valued function) |
| proton accelerator (defined in Atomic and nuclear structure) |
| proton spin fine structure (defined in gluons, quarks and QCD) |
| \psi (defined in notations of fundamental concepts in physics) |
| PSS (defined in large hadron collider) |
| pure state (defined in algebraic quantum field theories (AQFT)) |
| pushout (defined in Van Kampen Theorem for groups and groupoids) |