Mathematics 17 Applications of Mathematics 11 Differential Equations 10 Differential equations 10 Mathematical optimization 10 Probabilities 10 Probability Theory 10 Calculus of Variations and Optimization 9 Calculus of variations 9 Commutative Rings and Algebras 8 Commutative algebra 8 Commutative rings 8 Lie groups 7 Numerical Analysis 7 Numerical analysis 7 Topological Groups and Lie Groups 7 Topological groups 7 Algebraic Geometry 6 Algebraic geometry 6 Functional Analysis 5 Functional analysis 5 Manifolds (Mathematics) 5 Measure and Integration 5 Measure theory 5 Statistics  5 System theory 5 Algebra, Homological 4 Category Theory, Homological Algebra 4 Classical Mechanics 4 Dynamical Systems 4