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	<id>https://companal.subwiki.org/w/index.php?action=history&amp;feed=atom&amp;title=Winding_number_of_cycle_around_point</id>
	<title>Winding number of cycle around point - Revision history</title>
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	<updated>2026-08-02T14:48:49Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://companal.subwiki.org/w/index.php?title=Winding_number_of_cycle_around_point&amp;diff=534&amp;oldid=prev</id>
		<title>Vipul: 2 revisions</title>
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		<updated>2008-05-18T19:19:37Z</updated>

		<summary type="html">&lt;p&gt;2 revisions&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;1&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 19:19, 18 May 2008&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-notice&quot; lang=&quot;en&quot;&gt;&lt;div class=&quot;mw-diff-empty&quot;&gt;(No difference)&lt;/div&gt;
&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</summary>
		<author><name>Vipul</name></author>
	</entry>
	<entry>
		<id>https://companal.subwiki.org/w/index.php?title=Winding_number_of_cycle_around_point&amp;diff=533&amp;oldid=prev</id>
		<title>Vipul: /* Definition in terms of homology classes */</title>
		<link rel="alternate" type="text/html" href="https://companal.subwiki.org/w/index.php?title=Winding_number_of_cycle_around_point&amp;diff=533&amp;oldid=prev"/>
		<updated>2008-04-20T14:42:11Z</updated>

		<summary type="html">&lt;p&gt;&lt;span dir=&quot;auto&quot;&gt;&lt;span class=&quot;autocomment&quot;&gt;Definition in terms of homology classes&lt;/span&gt;&lt;/span&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
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				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 14:42, 20 April 2008&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l9&quot;&gt;Line 9:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 9:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;===Definition in terms of homology classes===&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;===Definition in terms of homology classes===&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Let &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; be a cycle (a sum of loops) in &amp;lt;math&amp;gt;\mathbb{C}&amp;lt;/math&amp;gt;, and &amp;lt;math&amp;gt;z_0 \in \mathbb{C}&amp;lt;/math&amp;gt; be a point not lying on any of the loos comprising &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt;. The &#039;&#039;&#039;winding number&#039;&#039;&#039; of &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; about &amp;lt;math&amp;gt;z_0&amp;lt;/math&amp;gt; is the homology class of &amp;lt;math&amp;gt;c&amp;lt;/&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;mat&lt;/del&gt;&amp;gt; viewed as a cycle in &amp;lt;math&amp;gt;\mathbb{C} \setminus \{ z_0\}&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Let &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; be a cycle (a sum of loops) in &amp;lt;math&amp;gt;\mathbb{C}&amp;lt;/math&amp;gt;, and &amp;lt;math&amp;gt;z_0 \in \mathbb{C}&amp;lt;/math&amp;gt; be a point not lying on any of the loos comprising &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt;. The &#039;&#039;&#039;winding number&#039;&#039;&#039; of &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; about &amp;lt;math&amp;gt;z_0&amp;lt;/math&amp;gt; is the homology class of &amp;lt;math&amp;gt;c&amp;lt;/&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;math&lt;/ins&gt;&amp;gt; viewed as a cycle in &amp;lt;math&amp;gt;\mathbb{C} \setminus \{ z_0\}&amp;lt;/math&amp;gt;.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Vipul</name></author>
	</entry>
	<entry>
		<id>https://companal.subwiki.org/w/index.php?title=Winding_number_of_cycle_around_point&amp;diff=532&amp;oldid=prev</id>
		<title>Vipul: New page: ==Definition==  ===Definition in terms of complex integrals===  Let &lt;math&gt;c&lt;/math&gt; be a cycle (a sum of loops) in &lt;math&gt;\mathbb{C}&lt;/math&gt; and &lt;math&gt;z_0 \in \mathbb{C}&lt;/math&gt; be a point not...</title>
		<link rel="alternate" type="text/html" href="https://companal.subwiki.org/w/index.php?title=Winding_number_of_cycle_around_point&amp;diff=532&amp;oldid=prev"/>
		<updated>2008-04-20T14:41:43Z</updated>

		<summary type="html">&lt;p&gt;New page: ==Definition==  ===Definition in terms of complex integrals===  Let &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; be a cycle (a sum of loops) in &amp;lt;math&amp;gt;\mathbb{C}&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;z_0 \in \mathbb{C}&amp;lt;/math&amp;gt; be a point not...&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;==Definition==&lt;br /&gt;
&lt;br /&gt;
===Definition in terms of complex integrals===&lt;br /&gt;
&lt;br /&gt;
Let &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; be a cycle (a sum of loops) in &amp;lt;math&amp;gt;\mathbb{C}&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;z_0 \in \mathbb{C}&amp;lt;/math&amp;gt; be a point not lying on any of the loops comprising &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt;. Then, the &amp;#039;&amp;#039;&amp;#039;winding number&amp;#039;&amp;#039;&amp;#039; of &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; about &amp;lt;math&amp;gt;z_0&amp;lt;/math&amp;gt;, denoted &amp;lt;math&amp;gt;n(c;z_0)&amp;lt;/math&amp;gt;, is defined by:&lt;br /&gt;
&lt;br /&gt;
&amp;lt;math&amp;gt;n(c;z_0) := \frac{1}{2\pi i }\int \frac{dz}{z - z_0}&amp;lt;/math&amp;gt;&lt;br /&gt;
&lt;br /&gt;
===Definition in terms of homology classes===&lt;br /&gt;
&lt;br /&gt;
Let &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; be a cycle (a sum of loops) in &amp;lt;math&amp;gt;\mathbb{C}&amp;lt;/math&amp;gt;, and &amp;lt;math&amp;gt;z_0 \in \mathbb{C}&amp;lt;/math&amp;gt; be a point not lying on any of the loos comprising &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt;. The &amp;#039;&amp;#039;&amp;#039;winding number&amp;#039;&amp;#039;&amp;#039; of &amp;lt;math&amp;gt;c&amp;lt;/math&amp;gt; about &amp;lt;math&amp;gt;z_0&amp;lt;/math&amp;gt; is the homology class of &amp;lt;math&amp;gt;c&amp;lt;/mat&amp;gt; viewed as a cycle in &amp;lt;math&amp;gt;\mathbb{C} \setminus \{ z_0\}&amp;lt;/math&amp;gt;.&lt;/div&gt;</summary>
		<author><name>Vipul</name></author>
	</entry>
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