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

Computes the trace of an algebraic number or alff element or
a matrix

<p><p>

<h3>
Syntax:
</h3>
<pre>n := Trace(a);
n := Trace(b, o);</pre>

<p>

<table>
<tr>
<td>algebraic element | alff elt | matrix | ff element</td>
<td><pre>  a  </pre></td>
<td></td>
</tr>
<tr>
<td>algebraic element | ff element</td>
<td><pre>  b  </pre></td>
<td></td>
</tr>
<tr>
<td>order</td>
<td><pre>  o  </pre></td>
<td></td>
</tr>
</table>

<p>


<h3>
Description:
</h3>
Depending on the type of <tt> a</tt> the trace of an algebraic element,
alff element or matrix is computed.

<p><p>

<p>
<hr>
<p>
<h3>
Example:
</h3>
All examples take place in {\Bbb Q}(\sqrt5): 
<pre>

kash> o := Order(Z, 2, 5);
Generating polynomial: x^2 - 5

kash> Trace(Elt(o, [1, 2]));
> 2

</pre>

<p>


<hr>

<p>
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