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	<title>Comments on: What Kind of Thing is a Sporadic Simple Group?</title>
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	<pubDate>Mon, 08 Sep 2008 03:58:32 +0000</pubDate>
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		<title>By: Walt</title>
		<link>http://www.arsmathematica.net/archives/2006/09/24/what-kind-of-thing-is-a-sporadic-simple-group/#comment-1439</link>
		<dc:creator>Walt</dc:creator>
		<pubDate>Sat, 30 Sep 2006 04:06:33 +0000</pubDate>
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		<description>That's an interesting result.  I wonder if people will begin to avoid invoking the classification and prove results directly: there is something unaesthetic about depending on a result whose proof is so long.</description>
		<content:encoded><![CDATA[<p>That&#8217;s an interesting result.  I wonder if people will begin to avoid invoking the classification and prove results directly: there is something unaesthetic about depending on a result whose proof is so long.</p>
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		<title>By: AlexandreBorovik</title>
		<link>http://www.arsmathematica.net/archives/2006/09/24/what-kind-of-thing-is-a-sporadic-simple-group/#comment-1438</link>
		<dc:creator>AlexandreBorovik</dc:creator>
		<pubDate>Thu, 28 Sep 2006 21:15:04 +0000</pubDate>
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		<description>Actually, there is a number of very specific results of asymptotic nature about finite simple groups ; Ashbacher's thesis is much more than just a philosophy. One of such results is a paper by Larsen and &lt;i&gt;Pink Finite Subgroups of Algebraic Groups&lt;/i&gt;. I quote the abstract:

    Generalizing a classical theorem of Jordan to arbitrary characteristic, we prove that every finite subgroup of GLn over a field of any characteristic p possesses a subgroup of bounded index which is composed of finite simple groups of Lie type in characteristic p, a commutative group of order prime to p, and a p-group. While this statement can be deduced from the classification of finite simple groups, our proof is self-contained and uses methods only from algebraic geometry and the theory of linear algebraic groups. We believe that our results can serve as a viable substitute for classification in a range of applications in various areas of mathematics.</description>
		<content:encoded><![CDATA[<p>Actually, there is a number of very specific results of asymptotic nature about finite simple groups ; Ashbacher&#8217;s thesis is much more than just a philosophy. One of such results is a paper by Larsen and <i>Pink Finite Subgroups of Algebraic Groups</i>. I quote the abstract:</p>
<p>    Generalizing a classical theorem of Jordan to arbitrary characteristic, we prove that every finite subgroup of GLn over a field of any characteristic p possesses a subgroup of bounded index which is composed of finite simple groups of Lie type in characteristic p, a commutative group of order prime to p, and a p-group. While this statement can be deduced from the classification of finite simple groups, our proof is self-contained and uses methods only from algebraic geometry and the theory of linear algebraic groups. We believe that our results can serve as a viable substitute for classification in a range of applications in various areas of mathematics.</p>
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		<title>By: JacquesC</title>
		<link>http://www.arsmathematica.net/archives/2006/09/24/what-kind-of-thing-is-a-sporadic-simple-group/#comment-1436</link>
		<dc:creator>JacquesC</dc:creator>
		<pubDate>Tue, 26 Sep 2006 02:43:25 +0000</pubDate>
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		<description>Small numbers are just bad news.

My own speculation involves &lt;a href="http://en.wikipedia.org/wiki/Kolmogorov_complexity" rel="nofollow"&gt;Kolmogorov complexity&lt;/a&gt;, in general agreement of your position.  Basically, when things are controlled by small numbers (dimension, size, whatever), there often isn't enough "room" for generic phenomena to happen.  Because of the lack of room, unlikely events are &lt;i&gt;forced&lt;/i&gt;.  Which turns out to be consistent with Corfield and Gelfand.  In other words, I think both explanations can be made consistent with each other.</description>
		<content:encoded><![CDATA[<p>Small numbers are just bad news.</p>
<p>My own speculation involves <a href="http://en.wikipedia.org/wiki/Kolmogorov_complexity" rel="nofollow">Kolmogorov complexity</a>, in general agreement of your position.  Basically, when things are controlled by small numbers (dimension, size, whatever), there often isn&#8217;t enough &#8220;room&#8221; for generic phenomena to happen.  Because of the lack of room, unlikely events are <i>forced</i>.  Which turns out to be consistent with Corfield and Gelfand.  In other words, I think both explanations can be made consistent with each other.</p>
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