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	<title>Comments on: Design of Computer Algebra Systems</title>
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	<link>http://math.andrej.com/2005/12/02/design-of-computer-algebra-systems/</link>
	<description>Mathematics for computers</description>
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		<title>By: Andrej Bauer</title>
		<link>http://math.andrej.com/2005/12/02/design-of-computer-algebra-systems/comment-page-1/#comment-52</link>
		<dc:creator>Andrej Bauer</dc:creator>
		<pubDate>Thu, 16 Feb 2006 23:59:48 +0000</pubDate>
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		<description>I would hardly call Focal a &quot;Computer Algebra System&quot;. It&#039;s a tool for writing correct programs. A computer algebra system is something that knows how to solve a cubic equation, for example.</description>
		<content:encoded><![CDATA[<p>I would hardly call Focal a &#8220;Computer Algebra System&#8221;. It&#8217;s a tool for writing correct programs. A computer algebra system is something that knows how to solve a cubic equation, for example.</p>
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		<title>By: Jon</title>
		<link>http://math.andrej.com/2005/12/02/design-of-computer-algebra-systems/comment-page-1/#comment-51</link>
		<dc:creator>Jon</dc:creator>
		<pubDate>Wed, 07 Dec 2005 03:00:54 +0000</pubDate>
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		<description>Not sure if you are aware of it, but there is an interesting certified CAS called &lt;a href=&quot;http://focal.inria.fr/site/index.php?option=com_content&amp;task=view&amp;id=16&amp;Itemid=49&quot; rel=&quot;nofollow&quot;&gt;Focal&lt;/a&gt;.</description>
		<content:encoded><![CDATA[<p>Not sure if you are aware of it, but there is an interesting certified CAS called <a href="http://focal.inria.fr/site/index.php?option=com_content&amp;task=view&amp;id=16&amp;Itemid=49" rel="nofollow">Focal</a>.</p>
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