CGAL::center_of_sphere

template <class ForwardIterator>
Point_d<R>	center_of_sphere ( ForwardIterator first, ForwardIterator last)
		returns the center of the sphere spanned by the points in A = tuple[first,last). Precondition: $$A contains $$d+1 affinely independent points of dimension $$d. Requirement: The value type of ForwardIterator is Point_d<R>.