MSCMSC
- [+]00-XXGeneral
- [+]01XXXHistory and Foundations
- [+]06XXXAlgebra
- [-]26XXXAnalysis
- [+]5XXXXGeometry and Topology
- [+]60XXXProbability and Statistics
- [+]65-XXNumerical analysis
- [+]68-XXComputer science
- [+]7XXXXApplications
- [+]97-XXMathematics education
- [+]26-XXReal functions
- [+]28-XXMeasure and integration
- [+]30-XXFunctions of a complex variable
- [+]31-XXPotential theory
- [+]32-XXSeveral complex variables and analytic spaces
- [+]33-XXSpecial functions
- [+]34-XXOrdinary differential equations
- [+]35-XXPartial differential equations
- [+]37-XXDynamical systems and ergodic theory
- [+]39-XXDifference and functional equations
- [+]40-XXSequences, series, summability
- [-]41-XXApproximations and expansions
- [+]42-XXFourier analysis
- [+]43-XXAbstract harmonic analysis
- [+]44-XXIntegral transforms, operational calculus
- [+]45-XXIntegral equations
- [+]46-XXFunctional analysis
- [+]47-XXOperator theory
- [+]49-XXCalculus of variations and optimal control; optimization
- 41-00General reference works (handbooks, dictionaries, bibliographies, etc.)
- 41-01Instructional exposition (textbooks, tutorial papers, etc.)
- 41-02Research exposition (monographs, survey articles)
- 41-03Historical
- 41-04Explicit machine computation and programs
- 41-06Proceedings, conferences, collections, etc.
- 41A05Interpolation
- 41A10Approximation by polynomials
- 41A15Spline approximation
- 41A17Inequalities in approximation (Bernstein, Jackson, Nikolcprime skiui-type inequalities)
- 41A20Approximation by rational functions
- 41A21Padé approximation
- 41A25Rate of convergence, degree of approximation
- 41A27Inverse theorems
- 41A28Simultaneous approximation
- 41A29Approximation with constraints
- 41A30Approximation by other special function classes
- 41A35Approximation by operators (in particular, by integral operators)
- 41A36Approximation by positive operators
- 41A40Saturation
- 41A44Best constants
- 41A45Approximation by arbitrary linear expressions
- 41A46Approximation by arbitrary nonlinear expressions; widths and entropy
- 41A50Best approximation, Chebyshev systems
- 41A52Uniqueness of best approximation
- 41A55Approximate quadratures
- 41A58Series expansions (e.g. Taylor, Lidstone series, but not Fourier series)
- 41A60Asymptotic approximations, asymptotic expansions (steepest descent, etc.)
- 41A63Multidimensional problems
- 41A65Abstract approximation theory (approximation in normed linear spaces and other abstract spaces)
- 41A80Remainders in approximation formulas
- 41A99Miscellaneous topics
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