Algebra Mathematics 14 Data processing 13 Trigonometry 7 Geometry 5 Functions 4 Group theory 4 History 4 Study and teaching (Secondary) 4 Algebraic logic 3 Algebraic topology 3 Combinatorics 3 Geometry, algebraic 3 Graphic methods 3 Mathematical analysis 3 Study and teaching 3 Topology 3 Algebras, Linear 2 Arithmetic 2 Commutative rings 2 Electronic data processing 2 Grobner bases 2 Harmonic analysis 2 Logic, Symbolic and mathematical 2 MACSYMA (Computer system) 2 Model theory 2 Perturbation (Mathematics) 2 Problems, exercises, etc 2 Rings (Algebra) 2 Abelian groups 1