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

Returns the inverse matrix (if possible).

<p><p>

<h3>
Syntax:
</h3>
<pre>A := MatInv(M);</pre>

<p>

<table>
<tr>
<td>matrix</td>
<td><pre>  A  </pre></td>
<td></td>
</tr>
<tr>
<td>matrix</td>
<td><pre>  M  </pre></td>
<td></td>
</tr>
</table>

<p>


<h3>
Description:
</h3>
Returns the inverse matrix <tt> A</tt> of <tt> M</tt>.
Returns an error if <tt> M</tt> is not invertible.

<p><p>

<p>
<hr>
<p>
<h3>
Example:
</h3>
Compute the inverse of the integer matrix
\left(\begin{array}{cc} 1 & 2 1 & 1 \end{array}right). 
<pre>

kash> M := Mat(Z,[[1,2],[1,1]]);
[1 2]
[1 1]
kash> MatInv(M);
> [-1  2]
[ 1 -1]

</pre>

<p>


<hr>

<p>
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