;class A&gt;
        typename <span class="RenoLink"><a href="deduce_mat.html">deduce_mat</a></span>&lt;A&gt;::type
        <span class="RenoLink">inverse</span>( A const &amp; a );</span>
    }
}</pre>
</div><h4>Preconditions:</h4>
<p><i>det!=<span class="RenoLink"><a href="scalar_traits.html">scalar_traits</a></span>&lt;typename <span class="RenoLink"><a href="mat_traits.html">mat_traits</a></span>&lt;A&gt;::<span class="RenoLink"><a href="mat_traits_M_scalar_type.html">scalar_type</a></span>&gt;::v