its&lt;E1, E2, scalar_multiplies&lt;typename E1::value_type, typename E2::value_type&gt; &gt;::result_type
    outer_prod (const vector_expression&lt;E1&gt; &amp;e1,
                 const vector_expression&lt;E2&gt; &amp;e2);</code>
</pre>
<h4>Description</h4>
<p><code>outer_prod</code> computes the outer product of two vector
expressions.</p>
<h4>Definition</h4>
<p>Defined in the header matrix_expression.hpp.</p>
<h4>Type requirements</h4>
<ul>
<li><code>E1</code> is a model of <a href=
"expression_concep