code>. All the elements of this new matrix
   are initially physically equal to <code class="code">e</code>.
   The element (<code class="code">x,y</code>) of a matrix <code class="code">m</code> is accessed
   with the notation <code class="code">m.(x).(y)</code>.</p>

<p>Raise <code class="code"><span class="constructor">Invalid_argument</span></code> if <code class="code">dimx</code> or <code class="code">dimy</code> is negative or
   greater than <a href="Sys.html#VALmax_array_length"><code class="code"