Algebraic topology Mathematics 41 Algebra 18 Geometry, algebraic 14 Cell aggregation 12 Topology 12 Global differential geometry 9 K-theory 7 Group theory 6 Number theory 6 Geometry 5 Topological groups 5 Differential equations, Partial 4 Mathematical physics 4 Functional analysis 3 Homotopy theory 3 Algebra, Homological 2 Categories (Mathematics) 2 Combinatorial topology 2 Combinatorics 2 Differentiable dynamical systems 2 Differential topology 2 Discrete groups 2 Point set theory 2 Popular works 2 Quantum theory 2 Surfaces 2 Topological algebras 2 Topological dynamics 2 Transformation groups 2