Editing Regular (section)

=== Algebra and number theory ===
* [[Regular category]], a kind of category that has similarities to both Abelian categories and to the category of sets
* [[Regular chain]]s in computer algebra
* [[Regular element (disambiguation)]], certain kinds of elements of an algebraic structure
* [[Regular extension]] of fields
* [[Regular ideal]] (multiple definitions)
* [[Regular Lie group]]
* [[Regular matrix (disambiguation)]]
* [[Regular monomorphism]]s and [[regular epimorphism]]s, monomorphisms (resp. epimorphisms) which equalize (resp. coequalize) some parallel pair of morphisms
* [[Regular number]]s, numbers which evenly divide a power of 60
* [[Regular p-group]], a concept capturing some of the more important properties of abelian ''p''-groups, but general enough to include most "small" ''p''-groups
* [[Regular prime]], a prime number ''p'' > 2 that does not divide the class number of the ''p''-th cyclotomic field
* The [[regular representation]] of a group G, the linear representation afforded by the group action of G on itself
* [[Regular ring]], a ring such that all its localizations have Krull dimension equal to the minimal number of generators of the maximal ideal
** [[von Neumann regular ring]], or absolutely flat ring (unrelated to the previous sense)
* [[Regular semi-algebraic system]]s in computer algebra
* [[Regular semigroup]], related to the previous sense
* [[Semigroup with involution#.2A .E2.80.93 regular semigroups|*-regular semigroup]]