Classification
MIDB - Algebraic topology
18
MFE - Algebras
17
MFD - Group theory, representation theory
13
MIDC - Topological manifolds
7
MFCC - Algebraic fields, rings, ideals, valuations
6
MIB - Measure theory, integration theory
4
MIDA - Analytical topology
3
MIEC - Hilbert spaces
3
MIED - Operators, functionals
3
MRB - Special functions, special polynomials
3
MWB - Stochastic processes
3
MFCD - Algebraic lattices
2
MFCF - Semigroups, categories, functors
2
MGC - Differential geometry
2
MKAD - Complex variable - ODE
2
MKAE - Stability theory - ODE
2
MKBH - Nonlinear PDE
2
MKDD - Special integral equations
2
MLF - Fourier analysis
2
MNC - Difference equations, difference methods
2
MRAB - Special series
2
MDB - Logics
1
MDD - Axiomatic set theory
1
MDE - Decidability, calculability, enumerability
1
MDF - Formal languages, coding theory
1
MEA - Number theory - general
1
MEAB - Elementary number theory
1
MEAC - Diophantine equations, diophantine approximations
1
MEAF - Algebraic number theory
1
MFAA - Combinations, graphs, tournaments
1
MFAD - Algebraic equations, algebraic functions
1
MFB - Linear algebra
1
MFBB - Matrices
1
MFC - Algebraic structures
1
MGB - Algebraic geometry
1
MIC - Complex analysis
1
MICC - Mapping in function theory
1
MID - Topology
1
MIEE - Distribution theory, generalized functions
1
MKAG - Asymptotic solutions of ODE
1
MKAH - Nonlinear ODE
1
MKBB - Initial value problems of PDE
1
MKBD - Mixed problems - PDE
1
MKBI - Systems of PDE
1
MKC - Functional equations and inequalities
1
MLE - Calculus of variations
1
MLHC - Integral transforms - non-Fourier, non-Laplace
1
MRD - Almost periodic functions, quasi periodic functions
1
MWE - Decision theory, game theory
1
PDA - Mechanics - general
1
more ...