From Wikipedia, the free encyclopedia

Regular may refer to:

Arts, entertainment, and media[edit]


Other uses in arts, entertainment, and media[edit]



Algebra and number theory[edit]


Combinatorics, discrete math, and mathematical computer science[edit]


Logic, set theory, and foundations[edit]

Probability and statistics[edit]

  • Regular conditional probability, a concept that has developed to overcome certain difficulties in formally defining conditional probabilities for continuous probability distributions
  • Regular stochastic matrix, a stochastic matrix such that all the entries of some power of the matrix are positive


  • Free regular set, a subset of a topological space that is acted upon disjointly under a given group action
  • Regular homotopy
  • Regular isotopy in knot theory, the equivalence relation of link diagrams that is generated by using the 2nd and 3rd Reidemeister moves only
  • Regular space (or ) space, a topological space in which a point and a closed set can be separated by neighborhoods



Science and social science[edit]

  • Regular bowel movements, the opposite of constipation
  • Regular economy, an economy characterized by an excess demand function whose slope at any equilibrium price vector is non-zero
  • Regular moon, a natural satellite that has low eccentricity and a relatively close and prograde orbit
  • Regular solutions in chemistry, solutions that diverge from the behavior of an ideal solution only moderately

Other uses[edit]

  • Regular customer, a person who visits the same restaurant, pub, store, or transit provider frequently
  • Regular (footedness) in boardsports, a stance in which the left foot leads

See also[edit]