CGAL 6.1.1 - Modular Arithmetic

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Modularizable Concept Reference
Reference Manual » Concepts

## Definition

An algebraic structure is called `Modularizable`, if there is a suitable mapping into an algebraic structure which is based on the type `CGAL::Residue`. For scalar types, e.g. Integers, this mapping is just the canonical homomorphism into the type `CGAL::Residue` with respect to the current prime. For compound types, e.g. Polynomials, the mapping is applied to the coefficients of the compound type.

The mapping is provided via `CGAL::Modular_traits<Modularizable>`, being a model of `ModularTraits`.

Note that types representing rationals, or types which do have some notion of denominator, are not `Modularizable`. This is due to the fact that the denominator may be zero modulo the prime, which can not be represented.

Has models
  `int`
  `long`
  `CORE::BigInt`
  `CGAL::Gmpz`
  `leda_integer`
  `mpz_class`

The following types are `Modularizable` iff their template arguments are.

Has models
  `CGAL::Lazy_exact_nt<NT>`
  `CGAL::Sqrt_extension<NT,ROOT>`
  `CGAL::Polynomial<Coeff>`

See also
  `CGAL::Residue`
  `CGAL::Modular_traits<T>`