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	<title>Double pushout graph rewriting - Revision history</title>
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	<updated>2026-08-24T14:21:50Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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		<id>https://en.formulasearchengine.com/w/index.php?title=Double_pushout_graph_rewriting&amp;diff=27753&amp;oldid=prev</id>
		<title>99.153.64.179: /* Generalization */ misc wikilinks</title>
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		<updated>2013-11-28T06:14:59Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Generalization: &lt;/span&gt; misc wikilinks&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;In [[general relativity]] the &amp;#039;&amp;#039;&amp;#039;Kantowski-Sachs metric&amp;#039;&amp;#039;&amp;#039; describes a [[homogeneous]] but [[anisotropic]] universe whose spatial section has the topology of &amp;lt;math&amp;gt; \mathbb{R} \times S^{2}&amp;lt;/math&amp;gt;. The metric is:&lt;br /&gt;
:&amp;lt;math&amp;gt;&lt;br /&gt;
ds^{2} = -dt^{2} + e^{2\sqrt{\Lambda}t} dz^{2} + \frac{1}{\Lambda}(d\theta^{2} + \sin^{2}\theta d\phi^{2})&lt;br /&gt;
&amp;lt;/math&amp;gt;&lt;br /&gt;
The [[isometry]] group of this spacetime is &amp;lt;math&amp;gt; \mathbb{R} \times SO(3)&amp;lt;/math&amp;gt;. Remarkably, the isometry group does not act simply transitively on spacetime, nor does it possess a subgroup with simple transitive action.&lt;br /&gt;
&lt;br /&gt;
==See also==&lt;br /&gt;
*[[Bianchi classification]]&lt;br /&gt;
*[[Ronald Kantowski]]&lt;br /&gt;
*[[Rainer Kurt Sachs]]&lt;br /&gt;
&lt;br /&gt;
[[Category:Physical cosmology]]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
{{astronomy-stub}}&lt;br /&gt;
{{physics-stub}}&lt;/div&gt;</summary>
		<author><name>99.153.64.179</name></author>
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