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CGAL 5.5.5 - Algebraic Foundations
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CGAL 5.5.5 - Algebraic Foundations
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A model of EuclideanRing represents an euclidean ring (or Euclidean domain). It is an UniqueFactorizationDomain that affords a suitable notion of minimality of remainders such that given \( x\) and \( y \neq 0\) we obtain an (almost) unique solution to \( x = qy + r \) by demanding that a solution \( (q,r)\) is chosen to minimize \( r\). In particular, \( r\) is chosen to be \( 0\) if possible.
Moreover, CGAL::Algebraic_structure_traits< EuclideanRing > is a model of AlgebraicStructureTraits providing:
CGAL::Algebraic_structure_traits< EuclideanRing >::Algebraic_category derived from CGAL::Unique_factorization_domain_tagCGAL::Algebraic_structure_traits< EuclideanRing >::Mod which is a model of AlgebraicStructureTraits_::ModCGAL::Algebraic_structure_traits< EuclideanRing >::Div which is a model of AlgebraicStructureTraits_::DivCGAL::Algebraic_structure_traits< EuclideanRing >::Div_mod which is a model of AlgebraicStructureTraits_::DivModRemarks
The most prominent example of a Euclidean ring are the integers. Whenever both \( x\) and \( y\) are positive, then it is conventional to choose the smallest positive remainder \( r\).
1.8.13