Eigen_solver_traits<T>

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CGAL::Eigen_solver_traits<T>

Definition

The class Eigen_solver_traits provides an interface to the sparse solvers of Eigen. The version 3.1 (or greater) of Eigen must be available on the system.

#include <CGAL/Eigen_solver_traits.h>

Is Model for the Concepts

SparseLinearAlgebraTraits_d.

Parameters

T: a sparse solver of Eigen. The default solver is the iterative bi-congugate gradient stabilized solver Eigen::BiCGSTAB for double.

Types

typedef typename T::Scalar	NT;

typedef CGAL::Eigen_vector<NT>	Vector;

Eigen_solver_traits<T>::Matrix
	If T is Eigen::ConjugateGradient<M> or Eigen::SimplicialCholesky<M>, Matrix is CGAL::Eigen_sparse_symmetric_matrix<T> and CGAL::Eigen_sparse_matrix<T> otherwise.

Operations

st.solver ()

Returns a reference to the internal Eigen solver. This function can be used for example to set specific parameters of the solver.

Example

The instantiation of this class assumes an Eigen sparse solver is provided. Here are few examples:

typedef CGAL::Eigen_sparse_matrix<double>::EigenType EigenMatrix;

//iterative general solver
typedef CGAL::Eigen_solver_traits< Eigen::BiCGSTAB<EigenMatrix> > Iterative_general_solver;

//iterative symmetric solver
typedef CGAL::Eigen_solver_traits< Eigen::ConjugateGradient<EigenMatrix> > Iterative_symmetric_solver;

//direct symmetric solver
typedef CGAL::Eigen_solver_traits< Eigen::SimplicialCholesky<EigenMatrix> > Direct_symmetric_solver;

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