Invariants MATHEMATICS 15 Differential operators 8 Geometry, Algebraic 8 Knot theory 7 Algebra 6 Geometry, Differential 6 more ... Linear algebraic groups 6 Link theory 6 Three-manifolds (Topology) 6 Calculus 5 Mathematical Analysis 5 Moduli theory 5 Finite groups 4 Mathematics 4 Quantum field theory 4 Representations of groups 4 Riemannian manifolds 4 Rings (Algebra) 4 Singularities (Mathematics) 4 Topology 4 Abelian groups 3 Algorithms 3 Categories (Mathematics) 3 Functions of complex variables 3 K-theory 3 Lie algebras 3 Lie groups 3 Metric spaces 3 Pseudodistances 3 less ...