Functional analysis 25 Functional Analysis 24 Algebra 23 Partial Differential Equations 23 Partial differential equations 23 Analysis 16 Analysis (Mathematics) 16 more ... Mathematical analysis 16 Number Theory 15 Number theory 15 Applied mathematics 12 Dynamical Systems and Ergodic Theory 12 Dynamics 12 Engineering mathematics 12 Ergodic theory 12 Applications of Mathematics 11 Mathematical physics 11 Probabilities 11 Probability Theory and Stochastic Processes 11 Group Theory and Generalizations 10 Group theory 10 Algebraic Geometry 9 Algebraic geometry 9 Geometry 9 Lie groups 9 Physics 9 Mathematical Logic and Foundations 8 Mathematical logic 8 Topological Groups, Lie Groups 8 Topological groups 8 less ...