Domain
This is an old revision of this page, as edited by Aschlafly (talk | contribs) at 13:48, March 1, 2008. It may differ significantly from current revision.
A domain is the set of points where a mathematical function is defined. When the function is a function of a complex variable, a domain is usually an open connected set.
Domains are useful in many fields of mathematics, including the study of analytic and harmonic functions.