Editing Regular (section)

=== Analysis ===
* [[Borel regular measure]]
* Cauchy-regular function (or [[Cauchy-continuous function]],) a continuous function between metric spaces which preserves Cauchy sequences
* [[Regular function]]s, functions that are analytic and single-valued (unique) in a given region
* [[Regular measure]], a measure for which every measurable set is "approximately open" and "approximately closed"
* The [[regular part]], of a Laurent series, the series of terms with positive powers
* [[Regular singular point]]s, in theory of ordinary differential equations where the growth of solutions is bounded by an algebraic function
* Regularity, the [[differentiability class|degree of differentiability]] of a function
* Regularity conditions arise in the study of [[first-class constraint]]s in Hamiltonian mechanics
* [[elliptic operator#Elliptic regularity theorem|Regularity of an elliptic operator]]
* [[Regularity theory]] of [[elliptic partial differential equation]]s