diff -Naur /old/boost/numeric/ublas/operation/num_columns.hpp /new/boost/numeric/ublas/operation/num_columns.hpp
--- /old/boost/numeric/ublas/operation/num_columns.hpp	2009-10-06 09:34:24.000000000 +0200
+++ /new/boost/numeric/ublas/operation/num_columns.hpp	2012-08-27 19:17:18.000000000 +0200
@@ -1,11 +1,9 @@
 /**
- * -*- c++ -*-
- *
  * \file num_columns.hpp
  *
  * \brief The \c num_columns operation.
  *
- * Copyright (c) 2009, Marco Guazzone
+ * Copyright (c) 2009-2012, Marco Guazzone
  *
  * Distributed under the Boost Software License, Version 1.0. (See
  * accompanying file LICENSE_1_0.txt or copy at
@@ -20,22 +18,24 @@
 
 
 #include <boost/numeric/ublas/detail/config.hpp>
+#include <boost/numeric/ublas/expression_types.hpp>
+#include <boost/numeric/ublas/traits.hpp>
 
 
 namespace boost { namespace numeric { namespace ublas {
 
-    /**
-     * \brief Return the number of columns.
-     * \tparam MatrixExprT A type which models the matrix expression concept.
-     * \param m A matrix expression.
-     * \return The number of columns.
-     */
-    template <typename MatrixExprT>
-    BOOST_UBLAS_INLINE
-    typename MatrixExprT::size_type num_columns(MatrixExprT const& m)
-    {
-        return m.size2();
-    }
+/**
+ * \brief Return the number of columns.
+ * \tparam MatrixExprT A type which models the matrix expression concept.
+ * \param m A matrix expression.
+ * \return The number of columns.
+ */
+template <typename MatrixExprT>
+BOOST_UBLAS_INLINE
+typename matrix_traits<MatrixExprT>::size_type num_columns(matrix_expression<MatrixExprT> const& me)
+{
+	return me().size2();
+}
 
 }}} // Namespace boost::numeric::ublas
 

diff -Naur /old/boost/numeric/ublas/operation/num_rows.hpp /new/boost/numeric/ublas/operation/num_rows.hpp
--- /old/boost/numeric/ublas/operation/num_rows.hpp	2009-10-06 09:34:24.000000000 +0200
+++ /new/boost/numeric/ublas/operation/num_rows.hpp	2012-08-27 19:17:24.000000000 +0200
@@ -1,11 +1,9 @@
 /**
- * -*- c++ -*-
- *
  * \file num_rows.hpp
  *
  * \brief The \c num_rows operation.
  *
- * Copyright (c) 2009, Marco Guazzone
+ * Copyright (c) 2009-2012, Marco Guazzone
  *
  * Distributed under the Boost Software License, Version 1.0. (See
  * accompanying file LICENSE_1_0.txt or copy at
@@ -19,22 +17,24 @@
 
 
 #include <boost/numeric/ublas/detail/config.hpp>
+#include <boost/numeric/ublas/expression_types.hpp>
+#include <boost/numeric/ublas/traits.hpp>
 
 
 namespace boost { namespace numeric { namespace ublas {
 
-    /**
-     * \brief Return the number of rows.
-     * \tparam MatrixExprT A type which models the matrix expression concept.
-     * \param m A matrix expression.
-     * \return The number of rows.
-     */
-    template <typename MatrixExprT>
-    BOOST_UBLAS_INLINE
-    typename MatrixExprT::size_type num_rows(MatrixExprT const& m)
-    {
-        return m.size1();
-    }
+/**
+ * \brief Return the number of rows.
+ * \tparam MatrixExprT A type which models the matrix expression concept.
+ * \param m A matrix expression.
+ * \return The number of rows.
+ */
+template <typename MatrixExprT>
+BOOST_UBLAS_INLINE
+typename matrix_traits<MatrixExprT>::size_type num_rows(matrix_expression<MatrixExprT> const& me)
+{
+	return me().size1();
+}
 
 }}} // Namespace boost::numeric::ublas