# Domain

Domain, Disambiguation page providing links to topics that could be referred to by the same search term.

Domain may refer to:

## Contents

• 1 Mathematics
• 2 Science
• 3 Information technology
• 4 Places
• 4.1 Australian Public Domains
• 4.2 New Zealand Public Domains
• 5 Film
• 6 Other uses

## Mathematics

• Domain of a function, the set of input values for which the (total) function is defined
• Domain of definition of a partial function
• Natural domain of a partial function
• Domain of holomorphy of a function
• Domain (mathematical analysis), an open connected set
• Domain of discourse, the set of entities over which logic variables may range
• Domain of an algebraic structure, the set on which the algebraic structure is defined
• Domain theory, the study of certain subsets of continuous lattices that provided the first denotational semantics of the lambda calculus
• Domain (ring theory), a nontrivial ring without left or right zero divisors
• Integral domain, a non-trivial commutative ring without zero divisors
• Atomic domain, an integral domain in which every non-zero non-unit is a finite product of irreducible elements
• Bézout domain, an integral domain in which the sum of two principal ideals is again a principal ideal
• Euclidean domain, an integral domain which allows a suitable generalization of the Euclidean algorithm
• Dedekind domain, an integral domain in which every nonzero proper ideal factors into a product of prime ideals
• GCD domain, an integral domain in which every two non-zero elements have a greatest common divisor
• Principal ideal domain, an integral domain in which every ideal is principal
• Unique factorization domain, an integral domain in which every non-zero element can be written as a product of irreducible elements in essentially a unique way
• Frequency domain, the analysis of mathematical functions with respect to frequency, rather than time
• Fundamental domain, subset of a space that contains exactly one point from each orbit of the action of a symmetry group
• Time domain, the analysis of mathematical functions with respect to time

## Science

• Domain (biology), a taxonomic subdivision larger than a kingdom
• High-field domain (physics) in semiconductors, also called Böer domain
• Protein domain (biology), a part of a protein that can exist independently of the rest of the protein chain
• Magnetic domain (physics), a region within a magnetic material which has uniform magnetization
• Social domain, a concept in sociology
• Domain of discourse, the collection of entities of interest in logical analysis