Mathematical Sciences Classification System
81Txx - Quantum field theory; related classical field theories 
[See also  70Sxx]
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                            81T05Axiomatic quantum field theory; operator algebras
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                            81T08Constructive quantum field theory
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                            81T10Model quantum field theories
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                            81T13
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                            81T15Perturbative methods of renormalization
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                            81T16Nonperturbative methods of renormalization
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                            81T17Renormalization group methods
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                            81T18Feynman diagrams
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                            81T20Quantum field theory on curved space backgrounds
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                            81T25Quantum field theory on lattices
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                            81T27Continuum limits
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                            81T28Thermal quantum field theory [See also 82B30]
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                            81T30String and superstring theories; other extended objects (e.g., branes) [See also 83E30]
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                            81T40Two-dimensional field theories, conformal field theories, etc.
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                            81T45
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                            81T50Anomalies
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                            81T55Casimir effect
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                            81T60Supersymmetric field theories
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                            81T70Quantization in field theory; cohomological methods [See also 58D29]
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                            81T75
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                            81T80Simulation and numerical modeling
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                            81T99None of the above, but in this section