Associative Rings and Algebras Associative rings 20 Mathematics 20 Rings (Algebra) 20 Algebra 10 Group Theory and Generalizations 8 Group theory 8 Commutative Rings and Algebras 7 Commutative algebra 7 Commutative rings 7 Algebra, Homological 6 Categories (Mathematics) 6 Category Theory, Homological Algebra 6 Number Theory 5 Number theory 5 Linear and Multilinear Algebras, Matrix Theory 4 Matrix theory 4 Algebraic Geometry 3 Field Theory and Polynomials 3 Field theory (Physics) 3 Geometry, Algebraic 3 Non-associative Rings and Algebras 3 Nonassociative rings 3 Algebraic Topology 2 Algebraic topology 2 Computer science 2 General Algebraic Systems 2 K-Theory 2 K-theory 2 Operator Theory 2