Homology theory 23 Algebra 4 Intersection homology theory 3 Algebra, Homological 2 Commutative algebra 2 Homotopy theory 2 Algebraic topology 1 Algebraic topology -- Classical topics -- Degree, winding number 1 Algebraic topology -- Homology and cohomology theories -- Other homology theories 1 Algebraic varieties 1 Atiyah-Singer index theorem 1 Cohomology 1 Curves, Elliptic 1 Differential topology 1 Field theory (Physics) 1 Finite fields (Algebra) 1 Forms, Quadratic 1 Galois theory 1 Geometry, Algebraic 1 Group theory 1 Group theory and generalizations -- Other generalizations of groups -- Loops, quasigroups 1 Group theory and generalizations -- Other generalizations of groups -- Sets with a single binary operation (groupoids) 1 Group theory and generalizations -- Permutation groups -- General theory for finite groups 1 Homology Theory 1 Injective modules (Algebra) 1 Knot theory 1 Linear algebraic groups 1 Local rings 1 Low-dimensional topology 1 Manifolds and cell complexes -- Low-dimensional topology -- Fundamental group, presentations, free differential calculus 1