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	<title>Sigma approximation - Revision history</title>
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	<updated>2026-04-10T19:44:59Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<updated>2013-03-13T22:22:10Z</updated>

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		<updated>2011-12-21T11:57:23Z</updated>

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		<author><name>en&gt;Qetuth</name></author>
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