Mathematics 27 Functional analysis 13 Number theory 13 Algebra 11 Geometry, algebraic 8 Mathematical analysis 8 Differential equations, Partial 7 Fourier analysis 6 Geometry, Algebraic 6 Graph theory 6 Operator theory 6 Probabilities 5 Topological groups 5 Algorithms 4 Commutative algebra 4 Fractals 4 Functions of complex variables 4 Global analysis (Mathematics) 4 Global differential geometry 4 Mathematical optimization 4 Mathematical physics 4 Wavelets (Mathematics) 4 Algebraic fields 3 Algebraic functions 3 Algebraic number theory 3 Computer science 3 Cryptography 3 Field theory (Physics) 3 Geometry 3 Group theory 3