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diff --git a/extern/Eigen2/Eigen/src/Sparse/SparseTranspose.h b/extern/Eigen2/Eigen/src/Sparse/SparseTranspose.h
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+++ b/extern/Eigen2/Eigen/src/Sparse/SparseTranspose.h
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+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra. Eigen itself is part of the KDE project.
+//
+// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
+//
+// Eigen is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 3 of the License, or (at your option) any later version.
+//
+// Alternatively, you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of
+// the License, or (at your option) any later version.
+//
+// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License and a copy of the GNU General Public License along with
+// Eigen. If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef EIGEN_SPARSETRANSPOSE_H
+#define EIGEN_SPARSETRANSPOSE_H
+
+template<typename MatrixType>
+struct ei_traits<SparseTranspose<MatrixType> > : ei_traits<Transpose<MatrixType> >
+{};
+
+template<typename MatrixType> class SparseTranspose
+  : public SparseMatrixBase<SparseTranspose<MatrixType> >
+{
+  public:
+
+    EIGEN_GENERIC_PUBLIC_INTERFACE(SparseTranspose)
+
+    class InnerIterator;
+    class ReverseInnerIterator;
+
+    inline SparseTranspose(const MatrixType& matrix) : m_matrix(matrix) {}
+
+    //EIGEN_INHERIT_ASSIGNMENT_OPERATORS(SparseTranspose)
+
+    inline int rows() const { return m_matrix.cols(); }
+    inline int cols() const { return m_matrix.rows(); }
+    inline int nonZeros() const { return m_matrix.nonZeros(); }
+
+    // FIXME should be keep them ?
+    inline Scalar& coeffRef(int row, int col)
+    { return m_matrix.const_cast_derived().coeffRef(col, row); }
+
+    inline const Scalar coeff(int row, int col) const
+    { return m_matrix.coeff(col, row); }
+
+    inline const Scalar coeff(int index) const
+    { return m_matrix.coeff(index); }
+
+    inline Scalar& coeffRef(int index)
+    { return m_matrix.const_cast_derived().coeffRef(index); }
+
+  protected:
+    const typename MatrixType::Nested m_matrix;
+};
+
+template<typename MatrixType> class SparseTranspose<MatrixType>::InnerIterator : public MatrixType::InnerIterator
+{
+  public:
+
+    EIGEN_STRONG_INLINE InnerIterator(const SparseTranspose& trans, int outer)
+      : MatrixType::InnerIterator(trans.m_matrix, outer)
+    {}
+};
+
+template<typename MatrixType> class SparseTranspose<MatrixType>::ReverseInnerIterator : public MatrixType::ReverseInnerIterator
+{
+  public:
+
+    EIGEN_STRONG_INLINE ReverseInnerIterator(const SparseTranspose& xpr, int outer)
+      : MatrixType::ReverseInnerIterator(xpr.m_matrix, outer)
+    {}
+};
+
+#endif // EIGEN_SPARSETRANSPOSE_H