Regular

The term regular can mean normal or obeying rules. Regular may refer to:

In organizations:

• Regular Army for military usage
• Regular clergy, members of a religious order subject to a rule of life
• Regular Force for usage in the Canadian Forces
• Regular Masonic jurisdictions, or regularity, refers to the constitutional mechanism by which Freemasonry Grand Lodges or Grand Orients give one another mutual recognition.

In mathematics, geometry, and statistics:

• Regular cardinal, a cardinal number that is equal to its cofinality
• Regular category, a kind of category that has similarities to both Abelian categories and to the category of sets
• Regular code, an algebraic code with a uniform distribution of distances between codewords
• Regular element (disambiguation), certain kinds of elements of an algebraic structure
• Regular function, a function that is analytic and single-valued (unique) in a given region
• Regular graph, a graph such that all the degrees of the vertices are equal
• Regular language, a formal language recognizable by a finite state automaton
• Regular polygon, a polygon where all angles and all sides are equal
• Regular polyhedron, a 3-dimensional equivalent to a regular polygon
• Regular prime, a certain kind of prime number
• 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
• Regular singular point in theory of ordinary differential equations where the growth of solutions is bounded by an algebraic function
• Regular space, a topological space in which a point and a closed set can be separated by neighbourhoods
• Regular surface in algebraic geometry
• Regularity, the degree of differentiability of a function
• Regularity conditions arise in the study of first class constraints in Hamiltonian mechanics
• Regularity of an elliptic operator
• Axiom of Regularity, also called the Axiom of Foundation, an axiom of set theory asserting the non-existence of certain infinite chains of sets
• Castelnuovo–Mumford regularity of a coherent sheaf

In medicine:

• Regular bowel movements, the opposite of constipation

In other uses:

• Regular character, a main character who appears more frequently and/or prominently than a recurring character
• Regular expression, a type of pattern describing a set of strings in computer science
• Regular verb, a grammatical term for a verb with derived forms that are typical for the language
• Regular customer, a person who visits the same restaurant, pub, store, or transit provider frequently

See also

• Irregular (disambiguation)