By Subject

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05 Combinatorics
13 Commutative algebra
15 Linear and multilinear algebra; matrix theory
20 Group theory and generalizations
22 Topological groups, Lie groups
26 Real functions
30 Functions of a complex variable
32 Several complex variables and analytic spaces
33 Special functions
34 Ordinary differential equations
35 Partial differential equations
37 Dynamical systems and ergodic theory
39 Difference and functional equations
40 Sequences, series, summability
41 Approximations and expansions
42 Harmonic analysis on Euclidean spaces
44 Integral transforms, operational calculus
45 Integral equations
46 Functional analysis
47 Operator theory
49 Calculus of variations and optimal control; optimization
53 Differential geometry
54 General topology
55 Algebraic topology
65 Numerical analysis
91 Game theory, economics, social and behavioral sciences
93 Systems theory, control
94 Information and communication, circuits