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	<id>https://diffgeom.subwiki.org/w/index.php?action=history&amp;feed=atom&amp;title=Isotopy_of_immersions</id>
	<title>Isotopy of immersions - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://diffgeom.subwiki.org/w/index.php?action=history&amp;feed=atom&amp;title=Isotopy_of_immersions"/>
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	<updated>2026-07-03T16:04:26Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
	<generator>MediaWiki 1.41.2</generator>
	<entry>
		<id>https://diffgeom.subwiki.org/w/index.php?title=Isotopy_of_immersions&amp;diff=786&amp;oldid=prev</id>
		<title>Vipul: 2 revisions</title>
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		<updated>2008-05-18T19:47:42Z</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 19:47, 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://diffgeom.subwiki.org/w/index.php?title=Isotopy_of_immersions&amp;diff=785&amp;oldid=prev</id>
		<title>Vipul at 23:51, 3 April 2008</title>
		<link rel="alternate" type="text/html" href="https://diffgeom.subwiki.org/w/index.php?title=Isotopy_of_immersions&amp;diff=785&amp;oldid=prev"/>
		<updated>2008-04-03T23:51:31Z</updated>

		<summary type="html">&lt;p&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;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&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 23:51, 3 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-l6&quot;&gt;Line 6:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 6:&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;* &amp;lt;math&amp;gt;F(p,0) = f_0(p)&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;F(p,1) = f_1(p)&amp;lt;/math&amp;gt;: In other words &amp;lt;math&amp;gt;F&amp;lt;/math&amp;gt; is a homotopy from &amp;lt;math&amp;gt;f_0&amp;lt;/math&amp;gt; to &amp;lt;math&amp;gt;f_1&amp;lt;/math&amp;gt;&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;* &amp;lt;math&amp;gt;F(p,0) = f_0(p)&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;F(p,1) = f_1(p)&amp;lt;/math&amp;gt;: In other words &amp;lt;math&amp;gt;F&amp;lt;/math&amp;gt; is a homotopy from &amp;lt;math&amp;gt;f_0&amp;lt;/math&amp;gt; to &amp;lt;math&amp;gt;f_1&amp;lt;/math&amp;gt;&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;div&gt;* For each &amp;lt;math&amp;gt;t&amp;lt;/math&amp;gt;, the map from &amp;lt;math&amp;gt;M&amp;lt;/math&amp;gt; to &amp;lt;math&amp;gt;\N&amp;lt;/math&amp;gt; given by &amp;lt;math&amp;gt;p \mapsto f(p,t)&amp;lt;/math&amp;gt; is an immersion&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;* For each &amp;lt;math&amp;gt;t&amp;lt;/math&amp;gt;, the map from &amp;lt;math&amp;gt;M&amp;lt;/math&amp;gt; to &amp;lt;math&amp;gt;\N&amp;lt;/math&amp;gt; given by &amp;lt;math&amp;gt;p \mapsto f(p,t)&amp;lt;/math&amp;gt; is an immersion&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;==Facts==&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&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;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;* [[Immersions in Euclidean space are isotopic in its square]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Vipul</name></author>
	</entry>
	<entry>
		<id>https://diffgeom.subwiki.org/w/index.php?title=Isotopy_of_immersions&amp;diff=784&amp;oldid=prev</id>
		<title>Vipul: New page: ==Definition==  Suppose &lt;math&gt;M, N&lt;/math&gt; are smooth manifolds of dimensions &lt;math&gt;m, n&lt;/math&gt; and &lt;math&gt;f_0,f_1: M \to N&lt;/math&gt; are two smooth immersions. An isotopy from &lt;math&gt;f_...</title>
		<link rel="alternate" type="text/html" href="https://diffgeom.subwiki.org/w/index.php?title=Isotopy_of_immersions&amp;diff=784&amp;oldid=prev"/>
		<updated>2008-04-03T23:50:29Z</updated>

		<summary type="html">&lt;p&gt;New page: ==Definition==  Suppose &amp;lt;math&amp;gt;M, N&amp;lt;/math&amp;gt; are &lt;a href=&quot;/wiki/Smooth_manifold&quot; class=&quot;mw-redirect&quot; title=&quot;Smooth manifold&quot;&gt;smooth manifolds&lt;/a&gt; of dimensions &amp;lt;math&amp;gt;m, n&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;f_0,f_1: M \to N&amp;lt;/math&amp;gt; are two smooth &lt;a href=&quot;/wiki/Immersion&quot; title=&quot;Immersion&quot;&gt;immersions&lt;/a&gt;. An isotopy from &amp;lt;math&amp;gt;f_...&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;
Suppose &amp;lt;math&amp;gt;M, N&amp;lt;/math&amp;gt; are [[smooth manifold]]s of dimensions &amp;lt;math&amp;gt;m, n&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;f_0,f_1: M \to N&amp;lt;/math&amp;gt; are two smooth [[immersion]]s. An isotopy from &amp;lt;math&amp;gt;f_0&amp;lt;/math&amp;gt; to &amp;lt;math&amp;gt;f_1&amp;lt;/math&amp;gt; is a map &amp;lt;math&amp;gt;F:M \times I \to \R^n&amp;lt;/math&amp;gt; such that the following hold:&lt;br /&gt;
&lt;br /&gt;
* &amp;lt;math&amp;gt;F&amp;lt;/math&amp;gt; is a [[smooth map]]&lt;br /&gt;
* &amp;lt;math&amp;gt;F(p,0) = f_0(p)&amp;lt;/math&amp;gt; and &amp;lt;math&amp;gt;F(p,1) = f_1(p)&amp;lt;/math&amp;gt;: In other words &amp;lt;math&amp;gt;F&amp;lt;/math&amp;gt; is a homotopy from &amp;lt;math&amp;gt;f_0&amp;lt;/math&amp;gt; to &amp;lt;math&amp;gt;f_1&amp;lt;/math&amp;gt;&lt;br /&gt;
* For each &amp;lt;math&amp;gt;t&amp;lt;/math&amp;gt;, the map from &amp;lt;math&amp;gt;M&amp;lt;/math&amp;gt; to &amp;lt;math&amp;gt;\N&amp;lt;/math&amp;gt; given by &amp;lt;math&amp;gt;p \mapsto f(p,t)&amp;lt;/math&amp;gt; is an immersion&lt;/div&gt;</summary>
		<author><name>Vipul</name></author>
	</entry>
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