## 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
$$*+,-, × ,/,sqrt()* and $$*kth_root*. Operations and comparisons
between objects 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 Concepts

*FieldWithRootOf*

*RealEmbeddable*