don't index Eigen

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diff --git a/eigen/Eigen/src/IterativeLinearSolvers/BasicPreconditioners.h b/eigen/Eigen/src/IterativeLinearSolvers/BasicPreconditioners.h
deleted file mode 100644
index f66c846..0000000
--- a/eigen/Eigen/src/IterativeLinearSolvers/BasicPreconditioners.h
+++ /dev/null
@@ -1,226 +0,0 @@
-// This file is part of Eigen, a lightweight C++ template library
-// for linear algebra.
-//
-// Copyright (C) 2011-2014 Gael Guennebaud <gael.guennebaud@inria.fr>
-//
-// This Source Code Form is subject to the terms of the Mozilla
-// Public License v. 2.0. If a copy of the MPL was not distributed
-// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-#ifndef EIGEN_BASIC_PRECONDITIONERS_H
-#define EIGEN_BASIC_PRECONDITIONERS_H
-
-namespace Eigen { 
-
-/** \ingroup IterativeLinearSolvers_Module
-  * \brief A preconditioner based on the digonal entries
-  *
-  * This class allows to approximately solve for A.x = b problems assuming A is a diagonal matrix.
-  * In other words, this preconditioner neglects all off diagonal entries and, in Eigen's language, solves for:
-    \code
-    A.diagonal().asDiagonal() . x = b
-    \endcode
-  *
-  * \tparam _Scalar the type of the scalar.
-  *
-  * \implsparsesolverconcept
-  *
-  * This preconditioner is suitable for both selfadjoint and general problems.
-  * The diagonal entries are pre-inverted and stored into a dense vector.
-  *
-  * \note A variant that has yet to be implemented would attempt to preserve the norm of each column.
-  *
-  * \sa class LeastSquareDiagonalPreconditioner, class ConjugateGradient
-  */
-template <typename _Scalar>
-class DiagonalPreconditioner
-{
-    typedef _Scalar Scalar;
-    typedef Matrix<Scalar,Dynamic,1> Vector;
-  public:
-    typedef typename Vector::StorageIndex StorageIndex;
-    enum {
-      ColsAtCompileTime = Dynamic,
-      MaxColsAtCompileTime = Dynamic
-    };
-
-    DiagonalPreconditioner() : m_isInitialized(false) {}
-
-    template<typename MatType>
-    explicit DiagonalPreconditioner(const MatType& mat) : m_invdiag(mat.cols())
-    {
-      compute(mat);
-    }
-
-    Index rows() const { return m_invdiag.size(); }
-    Index cols() const { return m_invdiag.size(); }
-    
-    template<typename MatType>
-    DiagonalPreconditioner& analyzePattern(const MatType& )
-    {
-      return *this;
-    }
-    
-    template<typename MatType>
-    DiagonalPreconditioner& factorize(const MatType& mat)
-    {
-      m_invdiag.resize(mat.cols());
-      for(int j=0; j<mat.outerSize(); ++j)
-      {
-        typename MatType::InnerIterator it(mat,j);
-        while(it && it.index()!=j) ++it;
-        if(it && it.index()==j && it.value()!=Scalar(0))
-          m_invdiag(j) = Scalar(1)/it.value();
-        else
-          m_invdiag(j) = Scalar(1);
-      }
-      m_isInitialized = true;
-      return *this;
-    }
-    
-    template<typename MatType>
-    DiagonalPreconditioner& compute(const MatType& mat)
-    {
-      return factorize(mat);
-    }
-
-    /** \internal */
-    template<typename Rhs, typename Dest>
-    void _solve_impl(const Rhs& b, Dest& x) const
-    {
-      x = m_invdiag.array() * b.array() ;
-    }
-
-    template<typename Rhs> inline const Solve<DiagonalPreconditioner, Rhs>
-    solve(const MatrixBase<Rhs>& b) const
-    {
-      eigen_assert(m_isInitialized && "DiagonalPreconditioner is not initialized.");
-      eigen_assert(m_invdiag.size()==b.rows()
-                && "DiagonalPreconditioner::solve(): invalid number of rows of the right hand side matrix b");
-      return Solve<DiagonalPreconditioner, Rhs>(*this, b.derived());
-    }
-    
-    ComputationInfo info() { return Success; }
-
-  protected:
-    Vector m_invdiag;
-    bool m_isInitialized;
-};
-
-/** \ingroup IterativeLinearSolvers_Module
-  * \brief Jacobi preconditioner for LeastSquaresConjugateGradient
-  *
-  * This class allows to approximately solve for A' A x  = A' b problems assuming A' A is a diagonal matrix.
-  * In other words, this preconditioner neglects all off diagonal entries and, in Eigen's language, solves for:
-    \code
-    (A.adjoint() * A).diagonal().asDiagonal() * x = b
-    \endcode
-  *
-  * \tparam _Scalar the type of the scalar.
-  *
-  * \implsparsesolverconcept
-  *
-  * The diagonal entries are pre-inverted and stored into a dense vector.
-  * 
-  * \sa class LeastSquaresConjugateGradient, class DiagonalPreconditioner
-  */
-template <typename _Scalar>
-class LeastSquareDiagonalPreconditioner : public DiagonalPreconditioner<_Scalar>
-{
-    typedef _Scalar Scalar;
-    typedef typename NumTraits<Scalar>::Real RealScalar;
-    typedef DiagonalPreconditioner<_Scalar> Base;
-    using Base::m_invdiag;
-  public:
-
-    LeastSquareDiagonalPreconditioner() : Base() {}
-
-    template<typename MatType>
-    explicit LeastSquareDiagonalPreconditioner(const MatType& mat) : Base()
-    {
-      compute(mat);
-    }
-
-    template<typename MatType>
-    LeastSquareDiagonalPreconditioner& analyzePattern(const MatType& )
-    {
-      return *this;
-    }
-    
-    template<typename MatType>
-    LeastSquareDiagonalPreconditioner& factorize(const MatType& mat)
-    {
-      // Compute the inverse squared-norm of each column of mat
-      m_invdiag.resize(mat.cols());
-      if(MatType::IsRowMajor)
-      {
-        m_invdiag.setZero();
-        for(Index j=0; j<mat.outerSize(); ++j)
-        {
-          for(typename MatType::InnerIterator it(mat,j); it; ++it)
-            m_invdiag(it.index()) += numext::abs2(it.value());
-        }
-        for(Index j=0; j<mat.cols(); ++j)
-          if(numext::real(m_invdiag(j))>RealScalar(0))
-            m_invdiag(j) = RealScalar(1)/numext::real(m_invdiag(j));
-      }
-      else
-      {
-        for(Index j=0; j<mat.outerSize(); ++j)
-        {
-          RealScalar sum = mat.col(j).squaredNorm();
-          if(sum>RealScalar(0))
-            m_invdiag(j) = RealScalar(1)/sum;
-          else
-            m_invdiag(j) = RealScalar(1);
-        }
-      }
-      Base::m_isInitialized = true;
-      return *this;
-    }
-    
-    template<typename MatType>
-    LeastSquareDiagonalPreconditioner& compute(const MatType& mat)
-    {
-      return factorize(mat);
-    }
-    
-    ComputationInfo info() { return Success; }
-
-  protected:
-};
-
-/** \ingroup IterativeLinearSolvers_Module
-  * \brief A naive preconditioner which approximates any matrix as the identity matrix
-  *
-  * \implsparsesolverconcept
-  *
-  * \sa class DiagonalPreconditioner
-  */
-class IdentityPreconditioner
-{
-  public:
-
-    IdentityPreconditioner() {}
-
-    template<typename MatrixType>
-    explicit IdentityPreconditioner(const MatrixType& ) {}
-    
-    template<typename MatrixType>
-    IdentityPreconditioner& analyzePattern(const MatrixType& ) { return *this; }
-    
-    template<typename MatrixType>
-    IdentityPreconditioner& factorize(const MatrixType& ) { return *this; }
-
-    template<typename MatrixType>
-    IdentityPreconditioner& compute(const MatrixType& ) { return *this; }
-    
-    template<typename Rhs>
-    inline const Rhs& solve(const Rhs& b) const { return b; }
-    
-    ComputationInfo info() { return Success; }
-};
-
-} // end namespace Eigen
-
-#endif // EIGEN_BASIC_PRECONDITIONERS_H