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	<id>https://en.formulasearchengine.com/w/index.php?action=history&amp;feed=atom&amp;title=Two-center_bipolar_coordinates</id>
	<title>Two-center bipolar coordinates - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://en.formulasearchengine.com/w/index.php?action=history&amp;feed=atom&amp;title=Two-center_bipolar_coordinates"/>
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	<updated>2026-07-15T09:35:23Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://en.formulasearchengine.com/w/index.php?title=Two-center_bipolar_coordinates&amp;diff=251982&amp;oldid=prev</id>
		<title>208.50.124.65: /* Transformation to polar coordinates */ caveat</title>
		<link rel="alternate" type="text/html" href="https://en.formulasearchengine.com/w/index.php?title=Two-center_bipolar_coordinates&amp;diff=251982&amp;oldid=prev"/>
		<updated>2014-08-15T17:27:41Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;Transformation to polar coordinates: &lt;/span&gt; caveat&lt;/p&gt;
&lt;a href=&quot;https://en.formulasearchengine.com/w/index.php?title=Two-center_bipolar_coordinates&amp;amp;diff=251982&amp;amp;oldid=251981&quot;&gt;Show changes&lt;/a&gt;</summary>
		<author><name>208.50.124.65</name></author>
	</entry>
	<entry>
		<id>https://en.formulasearchengine.com/w/index.php?title=Two-center_bipolar_coordinates&amp;diff=251981&amp;oldid=prev</id>
		<title>134.61.162.30: Added an example for what these coordinates system could be used for.</title>
		<link rel="alternate" type="text/html" href="https://en.formulasearchengine.com/w/index.php?title=Two-center_bipolar_coordinates&amp;diff=251981&amp;oldid=prev"/>
		<updated>2014-02-15T12:21:01Z</updated>

		<summary type="html">&lt;p&gt;Added an example for what these coordinates system could be used for.&lt;/p&gt;
&lt;a href=&quot;https://en.formulasearchengine.com/w/index.php?title=Two-center_bipolar_coordinates&amp;amp;diff=251981&amp;amp;oldid=15789&quot;&gt;Show changes&lt;/a&gt;</summary>
		<author><name>134.61.162.30</name></author>
	</entry>
	<entry>
		<id>https://en.formulasearchengine.com/w/index.php?title=Two-center_bipolar_coordinates&amp;diff=15789&amp;oldid=prev</id>
		<title>144.32.128.51 at 20:02, 11 December 2013</title>
		<link rel="alternate" type="text/html" href="https://en.formulasearchengine.com/w/index.php?title=Two-center_bipolar_coordinates&amp;diff=15789&amp;oldid=prev"/>
		<updated>2013-12-11T20:02:06Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;a href=&quot;https://en.formulasearchengine.com/w/index.php?title=Two-center_bipolar_coordinates&amp;amp;diff=15789&amp;amp;oldid=251980&quot;&gt;Show changes&lt;/a&gt;</summary>
		<author><name>144.32.128.51</name></author>
	</entry>
	<entry>
		<id>https://en.formulasearchengine.com/w/index.php?title=Two-center_bipolar_coordinates&amp;diff=251980&amp;oldid=prev</id>
		<title>en&gt;MathFacts: /* See also */</title>
		<link rel="alternate" type="text/html" href="https://en.formulasearchengine.com/w/index.php?title=Two-center_bipolar_coordinates&amp;diff=251980&amp;oldid=prev"/>
		<updated>2010-02-17T11:34:21Z</updated>

		<summary type="html">&lt;p&gt;&lt;span class=&quot;autocomment&quot;&gt;See also&lt;/span&gt;&lt;/p&gt;
&lt;a href=&quot;https://en.formulasearchengine.com/w/index.php?title=Two-center_bipolar_coordinates&amp;amp;diff=251980&quot;&gt;Show changes&lt;/a&gt;</summary>
		<author><name>en&gt;MathFacts</name></author>
	</entry>
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