Mathematical analysis 11 Number theory 11 Geometry, Differential 9 Mathematics 8 Topology 8 Algebra 7 Probabilities 6 Congresses 5 Finite groups 5 Game theory 5 Mathematical models 5 Approximation theory 4 Calculus 4 Characters of groups 4 Cryptography 4 Differential equations, Partial 4 Functional analysis 4 Functions of complex variables 4 Geometry, Algebraic 4 Measure theory 4 Operator theory 4 Representations of groups 4 Algebras, Linear 3 Calculus of variations 3 Class field theory 3 Compact groups 3 Differential equations 3 Differential geometry 3 Geometry 3 Mathematical optimization 3