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<p>&nbsp;<p>
<hr noshade size="5">
<h2><a name="MatId"></a>
MatId
</h2>

Returns the identity matrix of given dimension.

<p><p>

<h3>
Syntax:
</h3>
<pre>I := MatId(S, n);</pre>

<p>

<table>
<tr>
<td>matrix</td>
<td><pre>  I  </pre></td>
<td></td>
</tr>
<tr>
<td>ring</td>
<td><pre>  S  </pre></td>
<td></td>
</tr>
<tr>
<td>small integer</td>
<td><pre>  n  </pre></td>
<td></td>
</tr>
</table>

<p>


<h3>
Description:
</h3>
Returns the identity matrix I|n of dimension <tt> n</tt>
over the (unitary) ring <tt> S</tt>.

<p><p>

<p>
<hr>
<p>
<h3>
Example:
</h3>
Create I|3 over {\Bbb Z}[\sqrt[4]{-1}].
<pre>

kash> O := Order(Z,4,-1);
Generating polynomial: x^4 + 1

kash> MatId(O,3);
> [1 0 0]
[0 1 0]
[0 0 1]

</pre>

<p>


<hr>

<p>
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