Algebraic topology 81 Mathematics 9 Topology 9 Algebra-- Mathematics 7 Homotopy theory 5 Lecture Notes in Mathematics 5 Algebra 4 Algebra, Homological 3 Congresses 3 Digital techniques 3 Graph theory 3 Homology theory 3 Automorphisms 2 Categories (Mathematics) 2 Form perception 2 Geometry, Algebraic 2 Geometry, Differential 2 Graph theory-- Mathematics 2 Group theory 2 Image analysis 2 Image processing 2 Knot theory 2 MATHEMATICS / Algebra / General 2 MATHEMATICS / Geometry / General 2 Manifolds and cell complexes -- Low-dimensional topology -- Knots and links in $S^3$ 2 Partially ordered sets 2 Shapes 2 Three-dimensional imaging 2 Topological dynamics 2 Topological spaces 2