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## CORE::Expr

### Definition

The class CORE::Expr provides exact computation over the subset of real numbers that contains integers, and which is closed by the operations +,-, × ,/ and sqrt(). Comparisons between objets of this type are guaranteed to be exact. This number type is provided by the CORE library [KLPY99].

CGAL defines the necessary functions so that this class complies to the requirements on number types.

#include <CGAL/CORE_Expr.h>

### Is Model for the Concept

FieldNumberType

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The CGAL Project . Tue, December 21, 2004 .