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	<title>Fundamental class - Revision history</title>
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	<updated>2026-04-18T08:48:46Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://en.formulasearchengine.com/index.php?title=Fundamental_class&amp;diff=233284&amp;oldid=prev</id>
		<title>77.21.74.182: /* Poincaré duality */ Cap product with the fundamental class takes a cohomology class, not a homology class.</title>
		<link rel="alternate" type="text/html" href="https://en.formulasearchengine.com/index.php?title=Fundamental_class&amp;diff=233284&amp;oldid=prev"/>
		<updated>2014-06-29T22:02:43Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Poincaré duality: &lt;/span&gt; Cap product with the fundamental class takes a cohomology class, not a homology class.&lt;/p&gt;
&lt;a href=&quot;https://en.formulasearchengine.com/index.php?title=Fundamental_class&amp;amp;diff=233284&amp;amp;oldid=6100&quot;&gt;Show changes&lt;/a&gt;</summary>
		<author><name>77.21.74.182</name></author>
	</entry>
	<entry>
		<id>https://en.formulasearchengine.com/index.php?title=Fundamental_class&amp;diff=6100&amp;oldid=prev</id>
		<title>en&gt;Khazar2: /* External links */clean up, replaced: Encylopedia → Encyclopedia using AWB</title>
		<link rel="alternate" type="text/html" href="https://en.formulasearchengine.com/index.php?title=Fundamental_class&amp;diff=6100&amp;oldid=prev"/>
		<updated>2013-06-05T11:48:02Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;External links: &lt;/span&gt;clean up, replaced: Encylopedia → Encyclopedia using &lt;a href=&quot;/index.php?title=Testwiki:AWB&amp;amp;action=edit&amp;amp;redlink=1&quot; class=&quot;new&quot; title=&quot;Testwiki:AWB (page does not exist)&quot;&gt;AWB&lt;/a&gt;&lt;/p&gt;
&lt;a href=&quot;https://en.formulasearchengine.com/index.php?title=Fundamental_class&amp;amp;diff=6100&amp;amp;oldid=233283&quot;&gt;Show changes&lt;/a&gt;</summary>
		<author><name>en&gt;Khazar2</name></author>
	</entry>
	<entry>
		<id>https://en.formulasearchengine.com/index.php?title=Fundamental_class&amp;diff=233283&amp;oldid=prev</id>
		<title>en&gt;Marsupilamov: /* Poincaré duality */</title>
		<link rel="alternate" type="text/html" href="https://en.formulasearchengine.com/index.php?title=Fundamental_class&amp;diff=233283&amp;oldid=prev"/>
		<updated>2011-06-23T18:33:22Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Poincaré duality&lt;/span&gt;&lt;/p&gt;
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		<author><name>en&gt;Marsupilamov</name></author>
	</entry>
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