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	<title>formulasearchengine - User contributions [en]</title>
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	<updated>2026-08-26T10:36:40Z</updated>
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		<id>https://en.formulasearchengine.com/w/index.php?title=Gr%C3%B6tzsch_graph&amp;diff=251240</id>
		<title>Grötzsch graph</title>
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		<updated>2012-08-25T09:49:26Z</updated>

		<summary type="html">&lt;p&gt;75.68.164.243: Included the crossing number. Source: http://mathoverflow.net/questions/94282/crossing-number-of-the-grotzsch-graph&lt;/p&gt;
&lt;hr /&gt;
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		<author><name>75.68.164.243</name></author>
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