A model of *UniqueFactorizationDomain* is an *IntegralDomain* with the
additional property
that the ring it represents is a unique factorization domain
(a.k.a. UFD or factorial ring), meaning that every non-zero non-unit
element has a factorization into irreducible elements that is unique
up to order and up to multiplication by invertible elements (units).
(An irreducible element is a non-unit ring element that cannot be factored
further into two non-unit elements. In a UFD, the irreducible elements
are precisely the prime elements.)

In a UFD, any two elements, not both zero, possess a greatest common divisor (gcd).

Moreover, *CGAL::Algebraic_structure_traits< UniqueFactorizationDomain >*
is a model of *AlgebraicStructureTraits* providing:

- *CGAL::Algebraic_structure_traits< UniqueFactorizationDomain >::Algebraic_type*
derived from *Unique_factorization_domain_tag*

- *CGAL::Algebraic_structure_traits< UniqueFactorizationDomain >::Gcd*

*IntegralDomainWithoutDivision*

*IntegralDomain*

*UniqueFactorizationDomain*

*EuclideanRing*

*Field*

*FieldWithSqrt*

*FieldWithKthRoot*

*FieldWithRootOf*

*AlgebraicStructureTraits*

CGAL Open Source Project.
Release 3.5.
1 October 2009.