Concept to represent algebraic numbers of degree up to 2 over a RingNumberType denoted as RT.

 
Returns the
smaller or larger root of the equation $$aX^{2}+bX+c=0, if s
is true or false, respectively.
 

 
Returns the
smaller or larger root of the equation $$aX^{2}+bX+c=0, if s
is true or false, respectively.
 

 
Constructs
the number $$+ sqrt().

The comparison operators ==, !=, <, >, <=, >= as well as the sign and compare functions need to be provided to compare elements of types RootOf_2, RT and FT.
In addition, the following operations must be provided:











as well as

 Addition of two algebraic numbers, in the special case when they have been constructed from equations having the same discriminant. 
and similarly for operators , * and /.











double (non exact)
CGAL::Root_of_2, etc
CGAL::make_root_of_2
CGAL::Root_of_2<RT>
CGAL::Root_of_traits_2<RT>
AlgebraicKernelForCircles::PolynomialForCircles_2_2
AlgebraicKernelForCircles