arXiv is a free distribution service and an openaccess archive for 1,757,455 scholarly 文章s in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics. Materials on this site are not peerreviewed by arXiv.
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Astrophysics
(astroph new, recent, search)
includes: Astrophysics of Galaxies; Cosmology and Nongalactic Astrophysics; Earth and Planetary Astrophysics; High Energy Astrophysical Phenomena; Instrumentation and Methods for Astrophysics; Solar and Stellar Astrophysics 
Condensed Matter
(condmat new, recent, search)
includes: Disordered Systems and Neural Networks; Materials Science; Mesoscale and Nanoscale Physics; Other Condensed Matter; Quantum Gases; Soft Condensed Matter; Statistical Mechanics; Strongly Correlated Electrons; Superconductivity  General Relativity and Quantum Cosmology (grqc new, recent, search)
 High Energy Physics  Experiment (hepex new, recent, search)
 High Energy Physics  Lattice (heplat new, recent, search)
 High Energy Physics  Phenomenology (hepph new, recent, search)
 High Energy Physics  Theory (hepth new, recent, search)
 Mathematical Physics (mathph new, recent, search)

Nonlinear Sciences
(nlin new, recent, search)
includes: Adaptation and SelfOrganizing Systems; Cellular Automata and Lattice Gases; Chaotic Dynamics; Exactly Solvable and Integrable Systems; Pattern Formation and Solitons  Nuclear Experiment (nuclex new, recent, search)
 Nuclear Theory (nuclth new, recent, search)

Physics
(physics new, recent, search)
includes: Accelerator Physics; Applied Physics; Atmospheric and Oceanic Physics; Atomic and Molecular Clusters; Atomic Physics; Biological Physics; Chemical Physics; Classical Physics; Computational Physics; Data Analysis, Statistics and Probability; Fluid Dynamics; General Physics; Geophysics; History and Philosophy of Physics; Instrumentation and Detectors; Medical Physics; Optics; Physics and Society; Physics Education; Plasma Physics; Popular Physics; Space Physics  Quantum Physics (quantph new, recent, search)
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Mathematics
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includes (see detailed description): Algebraic Geometry; Algebraic Topology; Analysis of PDEs; Category Theory; Classical Analysis and ODEs; Combinatorics; Commutative Algebra; Complex Variables; Differential Geometry; Dynamical Systems; Functional Analysis; General Mathematics; General Topology; Geometric Topology; Group Theory; History and Overview; Information Theory; KTheory and Homology; Logic; Mathematical Physics; Metric Geometry; Number Theory; Numerical Analysis; Operator Algebras; Optimization and Control; Probability; Quantum Algebra; Representation Theory; Rings and Algebras; Spectral Theory; Statistics Theory; Symplectic Geometry
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Computing Research Repository
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includes (see detailed description): Artificial Intelligence; Computation and Language; Computational Complexity; Computational Engineering, Finance, and Science; Computational Geometry; Computer Science and Game Theory; Computer Vision and Pattern Recognition; Computers and Society; Cryptography and Security; Data Structures and Algorithms; Databases; Digital Libraries; Discrete Mathematics; Distributed, Parallel, and Cluster Computing; Emerging Technologies; Formal Languages and Automata Theory; General Literature; Graphics; Hardware Architecture; HumanComputer Interaction; Information Retrieval; Information Theory; Logic in Computer Science; Machine Learning; Mathematical Software; Multiagent Systems; Multimedia; Networking and Internet Architecture; Neural and Evolutionary Computing; Numerical Analysis; Operating Systems; Other Computer Science; Performance; Programming Languages; Robotics; Social and Information Networks; Software Engineering; Sound; Symbolic Computation; Systems and Control
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Quantitative Biology
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includes (see detailed description): Biomolecules; Cell Behavior; Genomics; Molecular Networks; Neurons and Cognition; Other Quantitative Biology; Populations and Evolution; Quantitative Methods; Subcellular Processes; Tissues and Organs
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Quantitative Finance
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includes (see detailed description): Computational Finance; Economics; General Finance; Mathematical Finance; Portfolio Management; Pricing of Securities; Risk Management; Statistical Finance; Trading and Market Microstructure
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Statistics
(stat new, recent, search)
includes (see detailed description): Applications; Computation; Machine Learning; Methodology; Other Statistics; Statistics Theory
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Electrical Engineering and Systems Science
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includes (see detailed description): Audio and Speech Processing; Image and Video Processing; Signal Processing; Systems and Control
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Economics
(econ new, recent, search)
includes (see detailed description): Econometrics; General Economics; Theoretical Economics