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	<updated>2026-05-26T16:11:35Z</updated>
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		<id>https://tcs.nju.edu.cn/wiki/index.php?title=Spacetime_metric&amp;diff=7844</id>
		<title>Spacetime metric</title>
		<link rel="alternate" type="text/html" href="https://tcs.nju.edu.cn/wiki/index.php?title=Spacetime_metric&amp;diff=7844"/>
		<updated>2016-07-31T18:45:52Z</updated>

		<summary type="html">&lt;p&gt;40.139.1.184: /* The metric */Fixed typo&lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;In [[special relativity]], the &#039;&#039;&#039;spacetime metric&#039;&#039;&#039;, also called the &#039;&#039;&#039;Minkowski metric&#039;&#039;&#039;&#039;, is the [[metric tensor]] that describes the [[line element]] in [[Minkowski spacetime]]. &lt;br /&gt;
&lt;br /&gt;
==The metric==&lt;br /&gt;
The metric can be described by the following line element:&lt;br /&gt;
&lt;br /&gt;
&amp;lt;math&amp;gt;ds^2=c^2dt^2-(dx^1)^2-(dx^2)^2-(dx^3)^2&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
In units where the [[speed of light]], &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt;, is one, then the metric in [[matrix]] form is&lt;br /&gt;
&lt;br /&gt;
&amp;lt;math&amp;gt;diag(1,-1,-1,-1)&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
[[Category:Relativity]]&lt;br /&gt;
&lt;br /&gt;
&lt;br /&gt;
{{physics-stub}}&lt;/div&gt;</summary>
		<author><name>40.139.1.184</name></author>
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