ize2 () const</code></td>
<td>Returns the number of columns.</td>
</tr>

<tr>
<td><code>const_reference operator () (size_type i, size_type j)
const</code></td>
<td>Returns the value of the <code>j</code>-th element in the
<code>i</code>-th row.</td>
</tr>

<tr>
<td><code>reference operator () (size_type i, size_type
j)</code></td>
<td>Returns a reference of the <code>j</code>-th element in the
<code>i</code>-th row.</td>
</tr>

<tr>
<td><code>matrix_slice &amp;operator = (const matrix_slice
&amp;ms)</code>