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**2000 Mathematics Subject Classification**

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__Search the MSC__||__Browse the MSC__||__Entire MSC2000__in__How to Use the MSC__The Mathematics Subject Classification (MSC) is used to categorize items covered by the two reviewing databases, Mathematical Reviews (MR) and Zentralblatt MATH (Zbl). The MSC is broken down into over 5,000 two-, three-, and five-digit classfications, each corresponding to a discipline of mathematics (e.g., 11 = Number theory; 11B = Sequences and sets; 11B05 = Density, gaps, topology).

The current classification system, 2000 Mathematics Subject Classification (MSC2000), is a revision of the 1991 Mathematics Subject Classification, which is the classification that has been used by MR and Zbl since the beginning of 1991. MSC2000 is the result of a collaborative effort by the editors of MR and Zbl to update the classification. The editors acknowledge the many helpful suggestions from the mathematical community during the revision process.

### Search the 2000 MSC

- The search is not case-sensitive.
- The Boolean operator,
**Or**, is the default between words within a keyword box; adjacency is not assumed. - To
**And**search terms, enter text into the two keyword boxes. - For exact word matches, use quotes and spaces. For example, for
**linear**but not nonlinear, enter**" linear "**. - For exact phrase matches, use quotes, e.g.
**"optimal control"**. - Wildcards are not allowed.

The search program is based on one developed by Chris Eilbeck of Heriot-Watt University, Edinburgh.

### Browse the 2000 MSC

00-xx | General |

01-xx | History and biography [See also the classification number -03 in the other sections] |

03-xx | Mathematical logic and foundations |

04-xx | This section has been deleted {For set theory see 03Exx} |

05-xx | Combinatorics {For finite fields, see 11Txx} |

06-xx | Order, lattices, ordered algebraic structures [See also 18B35] |

08-xx | General algebraic systems |

11-xx | Number theory |

12-xx | Field theory and polynomials |

13-xx | Commutative rings and algebras |

14-xx | Algebraic geometry |

15-xx | Linear and multilinear algebra; matrix theory |

16-xx | Associative rings and algebras {For the commutative case, see 13-xx} |

17-xx | Nonassociative rings and algebras |

18-xx | Category theory; homological algebra {For commutative rings see 13Dxx, for associative rings 16Exx, for groups 20Jxx, for topological groups and related structures 57Txx; see also 55Nxx and 55Uxx for algebraic topology} |

19-xx | $K$-theory [See also 16E20, 18F25] |

20-xx | Group theory and generalizations |

22-xx | Topological groups, Lie groups {For transformation groups, see 54H15, 57Sxx, 58-xx. For abstract harmonic analysis, see 43-xx} |

26-xx | Real functions [See also 54C30] |

28-xx | Measure and integration {For analysis on manifolds, see 58-xx} |

30-xx | Functions of a complex variable {For analysis on manifolds, see 58-xx} |

31-xx | Potential theory {For probabilistic potential theory, see 60J45} |

32-xx | Several complex variables and analytic spaces {For infinite-dimensional holomorphy, see 46G20, 58B12} |

33-xx | Special functions (33-xx deals with the properties of functions as functions) {For orthogonal functions, see 42Cxx; for aspects of combinatorics, see 05Axx; for number-theoretic aspects, see 11-xx; for representation theory, see 22Exx} |

34-xx | Ordinary differential equations |

35-xx | Partial differential equations |

37-xx | Dynamical systems and ergodic theory [See also 26A18, 28Dxx, 34Cxx, 34Dxx, 35Bxx, 46Lxx, 58Jxx, 70-xx] |

39-xx | Difference and functional equations |

40-xx | Sequences, series, summability |

41-xx | Approximations and expansions {For all approximation theory in the complex domain, see 30Exx, 30E05 and 30E10; for all trigonometric approximation and interpolation, see 42Axx, 42A10 and 42A15; for numerical approximation, see 65Dxx} |

42-xx | Fourier analysis |

43-xx | Abstract harmonic analysis {For other analysis on topological and Lie groups, see 22Exx} |

44-xx | Integral transforms, operational calculus {For fractional derivatives and integrals, see 26A33. For Fourier transforms, see 42A38, 42B10. For integral transforms in distribution spaces, see 46F12. For numerical methods, see 65R10} |

45-xx | Integral equations |

46-xx | Functional analysis {For manifolds modeled on topological linear spaces, see 57N20, 58Bxx} |

47-xx | Operator theory |

49-xx | Calculus of variations and optimal control; optimization [See also 34H05, 34K35, 65Kxx, 90Cxx, 93-xx] |

51-xx | Geometry {For algebraic geometry, see 14-xx} |

52-xx | Convex and discrete geometry |

53-xx | Differential geometry {For differential topology, see 57Rxx. For foundational questions of differentiable manifolds, see 58Axx} |

54-xx | General topology {For the topology of manifolds of all dimensions, see 57Nxx} |

55-xx | Algebraic topology |

57-xx | Manifolds and cell complexes {For complex manifolds, see 32Qxx} |

58-xx | Global analysis, analysis on manifolds [See also 32Cxx, 32Fxx, 32Wxx, 46-xx, 47Hxx, 53Cxx] {For geometric integration theory, see 49Q15} |

60-xx | Probability theory and stochastic processes {For additional applications, see 11Kxx, 62-xx, 90-xx, 91-xx,92-xx, 93-xx, 94-xx] |

62-xx | Statistics |

65-xx | Numerical analysis |

68-xx | Computer science {For papers involving machine computations and programs in a specific mathematical area, see Section -04 in that area} |

70-xx | Mechanics of particles and systems {For relativistic mechanics, see 83A05 and 83C10; for statistical mechanics, see 82-xx} |

73-xx | This section has been deleted {For mechanics of solids, see 74-xx} |

74-xx | Mechanics of deformable solids |

76-xx | Fluid mechanics {For general continuum mechanics, see 74Axx, or other parts of 74-xx} |

78-xx | Optics, electromagnetic theory {For quantum optics, see 81V80} |

80-xx | Classical thermodynamics, heat transfer {For thermodynamics of solids, see 74A15} |

81-xx | Quantum theory |

82-xx | Statistical mechanics, structure of matter |

83-xx | Relativity and gravitational theory |

85-xx | Astronomy and astrophysics {For celestial mechanics, see 70F15} |

86-xx | Geophysics [See also 76U05, 76V05] |

90-xx | Operations research, mathematical programming |

91-xx | Game theory, economics, social and behavioral sciences |

92-xx | Biology and other natural sciences |

93-xx | Systems theory; control {For optimal control, see 49-xx} |

94-xx | Information and communication, circuits |

97-xx | Mathematics education |

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