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00. GENERAL
 
01. Communication, education, history, and philosophy
01.10.-m Announcements, news, and organizational activities
01.10.Cr Announcements, news, and awards 
01.10.Fv Conferences, lectures, and institutes 
01.10.Hx Physics organizational activities 
01.20.+x Communication forms and techniques (written, oral, electronic, etc.)
01.30.-y Physics literature and publications
01.30.Bb Publications of lectures (advanced institutes, summer schools, etc.) 
01.30.Cc Conference proceedings 
01.30.Ee Monographs and collections 
01.30.Kj Handbooks, dictionaries, tables, and data compilations 
01.30.Mm Textbooks for graduates and researchers 
01.30.Pp Textbooks for undergraduates 
01.30.Rr Surveys and tutorial papers; resource letters 
01.30.Tt Bibliographies 
01.30.Vv Book reviews 
01.30Xx Publications in electronic media (for the topic of electronic publishing, see 01.20)
01.40.-d Education
01.40.Di Course design and evaluation 
01.40.Ej Science in elementary and secondary school 
01.40.Fk Physics education research (cognition, problem solving, etc.) 
01.40.Gm Curricula; teaching methods, strategies, theory of testing and evaluation 
01.40.Jp  Teacher training 
01.50.-i   Educational aids
01.50.Fr   Audio and visual aids, films 
01.50.Ht    Instructional computer use 
01.50.Kw   Techniques of testing 
01.50.Lc    Laboratory computer use (see also 01.50.Pa)
01.50.My   Demonstration experiments and apparatus 
01.50.Pa   Laboratory experiments and apparatus (see also 01.50.Lc)
01.50.Qb   Laboratory course design, organization, and evaluation 
01.50.Wg   Physics of toys 
01.52.+r   National and international laboratory facilities
01.55.+b   General physics
01.60.+q   Biographies, tributes, personal notes, and obituaries
01.65.+g   History of science
01.70.+w   Philosophy of science
01.75.+m    Science and society (for science and government, see 01.78)
01.78.+p    Science and government (funding, politics, etc.)
01.80.+b   Physics of sports
01.90.+g   Other topics of general interest (restricted to new topics in section 01)

02. Mathematical methods in physics

02.10.-v Logic, set theory, and algebra

02.10.Ab Logic and set theory

02.10.De Algebraic structures and number theory

02.10.Hh Rings and algebras

   02.10.Kn Knot theory

02.10.Ud Linear algebra

02.10.Xm Multilinear algebra

02.10.Yn Matrix theory 
 

02.20.-a   Group theory (for algebraic methods in quantum 
                mechanics, see 03.65.Fd; for symmetries in elementary 
                particle physics, see 11.30)

02.20.Bb  General structures of groups

2.20.Hj   Classical linear algebraic groups

02.20.Qs   General properties, structure, and representation of Lie groups

 02.20.Rt    Discrete subgroups of Lie groups

 02.20.Sv   Lie algebras of Lie groups

 02.20.Tw   Infinite-dimensional Lie groups

02.20.Uw  Quantum groups

 02.30.-f      Function theory, analysis

 02.30.Cj   Measure and integration

 02.30.Em   Potential theory

 02.30.Fn   Several complex variables and analytic spaces

 02.30.Gp   Special functions

 02.30.Hq Ordinary differential equations

 02.30.Ik   Integrable systems

 02.30.Jr   Partial differential equations

 02.30.Ks  Delay and functional equations

  02.30.Lt   Sequences, series, and summability

  02.30.Mv Approximations and expansions

  02.30.Nw Fourier analysis 

   02.30.Oz  Bifurcation theory (see also 47.20.Ky in fluid dynamics)

   02.30.Px  Abstract harmonic analysis

   02.30.Rz   Integral equations

    02.30.Sa   Functional analysis

    02.30.Tb   Operator theory

   02.30.Uu   Integral transforms

   02.30.Vv   Operational calculus

   02.30.Xx   Calculus of variations

   02.30.Yy   Control theory

   02.30.Zz   Inverse problems

    02.40.-k  Geometry, differential geometry, and topology (see also 
                                04 Relativity and gravitation)

    02.40.Dr  Euclidean and projective geometries

    02.40.Ft   Convex sets and geometric inequalities 

    02.40.Gh   Noncommutative geometry 

    02.40.Hw Classical differential geometry

    02.40.Ky Riemannian geometries

     02.40.Ma Global differential geometry

     02.40.Pc General topology

     02.40.Re Algebraic topology

     02.40.Sf  Manifolds and cell complexes

     02.40.Tt  Complex manifolds

     02.40.Vh Global analysis and analysis on manifolds

    02.40.Xx Singularity theory (see also 05.45.-a in statistical physics, 
                                thermodynamics, and nonlinear dynamical systems)

     02.40.Yy Geometric mechanics (see also 45.20.Jj in formalisms 
                                in classical mechanics)

      02.50.-r   Probability theory, stochastic processes, and statistics (see also 
                                section 05 Statistical physics, thermodynamics, and nonlinear 
                                dynamical systems)

      02.50.Cw Probability theory

      02.50.Ey  Stochastic processes

      02.50.Fz  Stochastic analysis

      02.50.Ga  Markov processes

      02.50.Le  Decision theory and game theory

      02.50.Ng  Distribution theory and Monte Carlo studies

       02.50.Sk  Multivariate analysis

      02.50.Tt    Inference methods

       02.60.-x  Numerical approximation and analysis

      02.60.Cb  Numerical simulation; solution of equations

      02.60.Dc  Numerical linear algebra

      02.60.Ed  Interpolation; curve fitting

      02.60.Gf  Algorithms for functional approximation

      02.60.Jh   Numerical differentiation and integration

      02.60.Lj   Ordinary and partial differential equations; boundary value problems

      02.60.Nm Integral and integrodifferential equations

      02.60.Pn  Numerical optimization

      02.70.-c  Computational techniques (for quantum computation, see 03.67.Lx)

      02.70.Bf  Finite-difference methods

      02.70.Dh Finite-element and Galerkin methods

      02.70.Hm Spectral methods

      02.70.Jn   Collocation methods

      02.70.Ns  Molecular dynamics and particle methods

      02.70.Pt   Boundary-integral methods

      02.70.Rr   General statistical methods

      02.70.Ss   Quantum Monte Carlo methods

      02.70.Tt   Justifications or modifications of Monte Carlo methods

      02.70.Uu   Applications of Monte Carlo methods (see also 02.50.Ng 
                                 and 05.10.Ln in statistical physics)

       02.90.+p   Other topics in mathematical methods in physics (restricted to 
                                 new topics in section 02)
 
03.Quantum mechanics, field theories, and special relativity (see 
          also 11 General theory of fields and particles)
03.30.+p   Special relativity
03.50.-z   Classical field theories
03.50.De   Classical electromagnetism, Maxwell equations 
                 (for applied classical  electromagnetism, see 41.20)
03.50.Kk   Other special classical field theories 
03.65.-w   Quantum mechanics (see also 03.67.-a Quantum information;
                 05.30  Quantum statistical mechanics)
03.65.Ca   Formalism 
03.65.Db   Functional analytical methods
03.65.Fd   Algebraic methods (see also 02.20 Group theory)

03.65.Ge   Solutions of wave equations: bound states 
 

03.65.Nk  Scattering theory 
03.65.Pm   Relativistic wave equations

 
 
 
 
 
 
 
 
 
 
 

 

03.65.Sq   Semiclassical theories and applications 

03.65.Ta   Foundations of quantum mechanics; measurement theory 

03.65.Ud  Entanglement and quantum nonlocality (e.g. EPR paradox, 
                  Bell's inequalities, GHZ states, etc.) 

03.65.Vf   Phases: geometric; dynamic or topological 

03.65.Wj   State reconstruction, quantum tomography 

03.65.Xp   Tunneling, traversal time, quantum Zeno dynamics 

03.65.Yz   Decoherence; open systems; quantum statistical methods 
 

03.67.-a    Quantum information
03.67.Dd   Quantum cryptography 
03.67.Hk   Quantum communication 
03.67.Lx   Quantum computation 
03.70.+k   Theory of quantized fields (see also 11.10 Field theory)
03.75.-b    Matter waves (for atom interferometry techniques,
                  see 39.20—in atomic and molecular physics)
03.75.Be    Atom and neutron optics
03.75.Dg    Atom and neutron interferometry 
03.75.Fi   Phase coherent atomic ensembles; quantum condensation phenomena
04. General relativity and gravitation (see also 95.30.Sf 
                   in astronomy)
... ... ...       Special relativity, see 03.30
04.20.-q   Classical general relativity (see also 02.40 Geometry, 
                 differential geometry, and  topology)
04.20.Cv   Fundamental problems and general formalism 
04.20.Dw   Singularities and cosmic censorship 
04.20.Ex   Initial value problem, existence and uniqueness of solutions 
04.20.Fy   Canonical formalism, Lagrangians, and variational principles 
04.20.Gz   Spacetime topology, causal structure, spinor structure
04.20.Ha   Asymptotic structure 
04.20.Jb   Exact solutions 
04.25.-g   Approximation methods; equations of motion
04.25.Dm   Numerical relativity 
04.25.Nx    Post-Newtonian approximation; perturbation theory; 
                   related approximations 
04.30.-w   Gravitational waves: theory
04.30.Db   Wave generation and sources 
04.30.Nk   Wave propagation and interactions 
04.40.-b   Self-gravitating systems; continuous media and classical fields in curved spacetime
04.40.Dg   Relativistic stars: structure, stability, and oscillations (see also 97.60 Late 
                 stages of stellar evolution)
04.40.Nr   Einstein–Maxwell spacetimes, spacetimes with fluids, radiation or classical fields 
04.50.+h   Gravity in more than four dimensions, Kaluza–Klein theory, unified field theories; alternative theories of gravity (see also 11.25.Mj Compactification and four-dimensional models)
04.60.-m   Quantum gravity
04.60.Ds   Canonical quantization 
04.60.Gw   Covariant and sum-over-histories quantization 
04.60.Kz   Lower dimensional models; minisuperspace models 
04.60.Nc   Lattice and discrete methods 
04.62.+v   Quantum field theory in curved spacetime
04.65.+e   Supergravity (see also 12.60.Jv Supersymmetric models)
04.70.-s   Physics of black holes (see also 97.60.Lf—in astronomy)
04.70.Bw   Classical black holes 
04.70.Dy   Quantum aspects of black holes, evaporation, thermodynamics 
04.80.-y   Experimental studies of gravity
04.80.Cc   Experimental tests of gravitational theories 
04.80.Nn   Gravitational wave detectors and experiments (see also 
                 95.55.Ym—in astronomy)
04.90.+e   Other topics in general relativity and gravitation 
                 (restricted to new topics in section 04)
05.  Statistical physics, thermodynamics, and nonlinear dynamical systems (see also 02.50 Probability theory, stochastic processes, and statistics)
05.10.-a    Computational methods in statistical physics and nonlinear dynamics (see also 02.70 in mathematical methods in physics)
05.10.Cc   Renormalization group methods 
05.10.Gg   Stochastic analysis methods (Fokker-Planck, Langevin, etc.) 
05.10.Ln   Monte Carlo methods 
05.20.-y   Classical statistical mechanics
05.20.Dd  Kinetic theory 
05.20.Gg  Classical ensemble theory 
05.20.Jj  Statistical mechanics of classical fluids (see also 47.10 General theory in fluid dynamics)
05.30.-d  Quantum statistical mechanics
05.30.Ch   Quantum ensemble theory 
05.30.Fk   Fermion systems and electron gas (see also 71.10 Theories and models of 
                many-electron systems)
05.30.Jp   Boson systems (for Bose-Einstein condensation, see 03.75.Fi)
05.30.Pr   Fractional statistics systems (anyons, etc.) 
05.40.-a   Fluctuation phenomena, random processes, noise, and Brownian motion
05.40.Ca   Noise 
05.40.Fb   Random walks and Levy flights 
05.40.Jc   Brownian motion 
05.45.-a   Nonlinear dynamics and nonlinear dynamical systems (see 
                also 45 Classical mechanics of discrete systems)
05.45.Ac   Low-dimensional chaos 
05.45.Df   Fractals (see also 47.53 Fractals in fluid dynamics)
05.45.Gg   Control of chaos, applications of chaos 
05.45.Jn   High-dimensional chaos 
05.45.Mt   Semiclassical chaos (“quantum chaos”) 
05.45.Pq   Numerical simulations of chaotic models 
05.45.Ra   Coupled map lattices 
05.45.Tp   Time series analysis 
05.45.Vx   Communication using chaos 
05.45.Xt   Synchronization; coupled oscillators 
05.45.Yv   Solitons (see 52.35.Sb for solitons in plasma; for 
                 solitons in acoustics, see 43.25.Rq—in acoustics appendix;  see 
                 42.50.Md, 42.65.Tg, 42.81.Dp for solitons in optics)
05.50.+q   Lattice theory and statistics (Ising, Potts, etc.) (see also 
                 64.60.Cn Order- disorder transformations and statistical 
                  mechanics of model systems and 75.10.Hk Classical spin models)
05.60.-k   Transport processes
05.60.Cd   Classical transport 
05.60.Gg   Quantum transport 
05.65.+b   Self-organized systems (see also 45.70 in classical 
                 mechanics of discrete systems)
05.70.-a   Thermodynamics (see also 64 Equations of state, phase equilibria, and phase transitions, and 65 Thermal properties of condensed matter; for chemical thermodynamics, see 82.60)

... ... ...     Thermodynamics of nanoparticles, see 82.60.Qr

05.70.Ce   Thermodynamic functions and equations of state 
05.70.Fh   Phase transitions: general studies 

05.70.Jk Critical point phenomena

05.70.Ln   Nonequilibrium and irreversible thermodynamics (see also 82.40.Bj Oscillations, chaos, and bifurcations in physical chemistry and chemical physics) 
05.70.Np   Interface and surface thermodynamics (see also 68.35.Md Surface thermodynamics, surface energies in surfaces and interfaces)
05.90.+m   Other topics in statistical physics, thermodynamics, and nonlinear dynamical systems (restricted to new topics in section 05)
06.  Metrology, measurements, and laboratory procedures
06.20.-f  Metrology
06.20.Dk  Measurement and error theory 
06.20.Fn  Units and standards 
06.20.Jr  Determination of fundamental constants 
06.30.-k  Measurements common to several branches of physics and astronomy
06.30.Bp  Spatial dimensions (e.g., position, lengths, volume, angles, displacements) 
06.30.Dr  Mass and density 
06.30.Ft  Time and frequency 
06.30.Gv  Velocity, acceleration, and rotation 
06.60.-c  Laboratory procedures
06.60.Ei  Sample preparation (including design of sample holders) 
06.60.Jn  High-speed techniques (microsecond to femtosecond) 
06.60.Mr  Testing and inspecting procedures 
06.60.Sx  Positioning and alignment; manipulating, remote handling 
06.60.Vz   Workshop procedures (welding, machining, lubrication, bearings, etc.) 
06.60.Wa   Laboratory safety procedures 
• • • • •National and international laboratory facilities, see 01.52
06.90.+v   Other topics in metrology, measurements, and laboratory procedures (restricted to new topics in section 06)
07.   Instruments, apparatus, and components common to several branches of physics and astronomy (see also each subdiscipline for specialized instrumentation and techniques)
07.05.-t   Computers in experimental physics

... ... ...     Computers in physics education, see 01.50.Ht and 01.50.Lc
... ... ...     Computational techniques, see 02.70—in mathematical methods in physics
... ... ...     Quantum computation, see 03.67.Lx in quantum mechanics

07.05.Bx   Computer systems: hardware, operating systems, computer languages, and utilities 
07.05.Dz   Control systems 
07.05.Fb   Design of experiments 
07.05.Hd   Data acquisition: hardware and software 
07.05.Kf   Data analysis: algorithms and implementation; data management 
07.05.Mh   Neural networks, fuzzy logic, artificial intelligence 
07.05.Pj   Image processing (see also 42.30.Va in optics; 87.57 Medical imaging: general — in biological and medical physics)
07.05.Rm   Data presentation and visualization: algorithms and implementation 
07.05.Tp   Computer modeling and simulation
07.05.Wr   Computer interfaces 
07.07.-a   General equipment
07.07.Df   Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing 
07.07.Hj   Display and recording equipment, oscilloscopes, TV cameras, etc. 
07.07.Mp   Transducers 
07.07.Tw   Servo and control equipment; robots
07.07.Vx   Hygrometers 
07.10.-h   Mechanical instruments and equipment
07.10.Cm   Micromechanical devices and systems (for micro- and nano-electromechanical systems (MEMS/NEMS), see 85.85.+j in electronic and magnetic devices)
07.10.Fq   Vibration isolation 
07.10.Lw   Balance systems, tensile machines, etc. 
07.10.Pz   Instruments for strain, force, and torque 
07.20.-n   Thermal instruments and apparatus
07.20.Dt   Thermometers 
07.20.Fw   Calorimeters (for calorimeters as radiation 
                 detectors, see 29.40.Vj)
07.20.Hy   Furnaces; heaters 
07.20.Ka   High-temperature instrumentation; pyrometers 
07.20.Mc   Cryogenics; refrigerators, low-temperature equipment 
07.20.Pe   Heat engines; heat pumps 
07.30.-t   Vacuum apparatus 
07.30.Bx   Degasification, residual gas 
07.30.Cy   Vacuum pumps 
07.30.Dz   Vacuum gauges 
07.30.Hd   Vacuum testing methods; leak detectors 
07.30.Kf   Vacuum chambers, auxiliary apparatus, and materials 
07.35.+k   High-pressure apparatus; shock tubes; 
                 diamond anvil cells
07.50.-e   Electrical and electronic instruments and components 
07.50.Ek   Circuits and circuit components (see also 84.30 Electronic circuits and 84.32 Passive circuit components)
07.50.Hp   Electrical noise and shielding equipment 
07.50.Ls   Electrometers 
07.50.Qx   Signal processing electronics (see also 84.40.Ua—in radiowave and microwave technology)
07.55.-w   Magnetic instruments and components 
07.55.Db   Generation of magnetic fields; magnets
07.55.Ge   Magnetometers for magnetic field measurements 
07.55.Jg   Magnetometers for susceptibility, magnetic moment, and magnetization measurements 
07.55.Nk   Magnetic shielding in instruments 
07.57.-c   Infrared, submillimeter wave, microwave and radiowave instruments and  equipment (for infrared and radio telescopes, see 95.55)
07.57.Hm   Infrared, submillimeter wave, microwave, and radiowave sources 
07.57.Kp   Bolometers; infrared, submillimeter wave, microwave, and radiowave receivers and detectors (see also 85.60.Gz Photodetectors in electronic and magnetic devices, and 95.55.Rg Photoconductors and bolometers in astronomy)
07.57.Pt   Submillimeter wave, microwave and radiowave spectrometers; magnetic resonance spectrometers, auxiliary equipment, and techniques
07.57.Ty   Infrared spectrometers, auxiliary equipment, and techniques 
07.60.-j   Optical instruments and equipment

... ... ...     Optical sources, see 42.72.-g
... ... ...     Optical elements, devices, and systems 42.79.-e
... ... ...     Optoelectronic devices 85.60.-q
... ... ...     Optical telescopes, see 95.55.Cs

07.60.Dq   Photometers, radiometers, and colorimeters 
07.60.Fs   Polarimeters and ellipsometers 
07.60.Hv   Refractometers and reflectometers 
07.60.Ly   Interferometers 
07.60.Pb   Conventional optical microscopes (for near-field scanning optical 
                microscopes, see 07.79.Fc; for x-ray microscopes, see 07.85.Tt)
07.60.Rd   Visible and ultraviolet spectrometers 
07.60.Vg   Fiber-optic instruments (see also 42.81 Fiber optics— in optics)
07.64.+z   Acoustic instruments and equipment (see also 43.58 in acoustics)
07.68.+m  Photography, photographic instruments; xerography
07.75.+h   Mass spectrometers (see also 82.80.Ms, 82.80.Nj, and 82.80.Rt in physical chemistry and chemical physics) 
07.77.-n   Atomic, molecular, and charged-particle sources and detectors
07.77.Gx   Atomic and molecular beam sources and detectors (see also 39.10.+j in atomic and molecular physics) 
07.77.Ka   Charged-particle beam sources and detectors (see also 29.40.-n in nuclear physics)
07.78.+s   Electron, positron, and ion microscopes; electron 
                  diffractometers
07.79.-v   Scanning probe microscopes and components (see also 68.37.-d in surfaces and interfaces)
07.79.Cz   Scanning tunneling microscopes 
07.79.Fc   Near-field scanning optical microscopes 
07.79.Lh   Atomic force microscopes 
07.79.Pk   Magnetic force microscopes 
07.79.Sp   Friction force microscopes 
07.81.+a   Electron and ion spectrometers (see also 29.30.-h in nuclear physics)
07.85.-m   X- and gamma-ray instruments (for x- and gamma-ray 
                 telescopes, see 95.55.Ka) 
07.85.Fv    X- and gamma-ray sources, mirrors, gratings, and detectors 

07.85.Jy   Diffractometers 

07.85.Nc   X-ray and gamma-ray spectrometers 

07.85.Qe   Synchrotron radiation instrumentation 
07.85.Tt   X-ray microscopes 
07.87.+v   Spaceborne and space research instruments, apparatus, and components (satellites, space vehicles, etc.) (For aeronomy and magnetospheric instrumentation, see 94.80; see also 95.55 Astronomical and space-research instrumentation)
07.88.+y   Instruments for environmental pollution measurements 
07.89.+b   Environmental effects on instruments (e.g., radiation and pollution effects) 
07.90.+c   Other topics in instruments, apparatus, and components common to several branches of physics and astronomy (restricted to new topics in section 07) 

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