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	<id>https://commalg.subwiki.org/w/index.php?action=history&amp;feed=atom&amp;title=Urysohn_space</id>
	<title>Urysohn space - Revision history</title>
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	<updated>2026-07-03T05:51:48Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://commalg.subwiki.org/w/index.php?title=Urysohn_space&amp;diff=2196&amp;oldid=prev</id>
		<title>Vipul at 01:42, 22 May 2026</title>
		<link rel="alternate" type="text/html" href="https://commalg.subwiki.org/w/index.php?title=Urysohn_space&amp;diff=2196&amp;oldid=prev"/>
		<updated>2026-05-22T01:42:28Z</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;
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				&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 01:42, 22 May 2026&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-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&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==&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==&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;A topological space &amp;lt;math&amp;gt;X&amp;lt;/math&amp;gt; is termed a &#039;&#039;&#039;Urysohn space&#039;&#039;&#039; if given any two distinct points &amp;lt;math&amp;gt;x,y \in X&amp;lt;/math&amp;gt;, there exists a continuous function &amp;lt;math&amp;gt;f:X \to [0,1]&amp;lt;/math&amp;gt; such that &amp;lt;math&amp;gt;f(x) = 0&amp;lt;/math&amp;gt;, &amp;lt;math&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;lt;&lt;/del&gt;f(y) = 1&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;A topological space &amp;lt;math&amp;gt;X&amp;lt;/math&amp;gt; is termed a &#039;&#039;&#039;Urysohn space&#039;&#039;&#039; if given any two distinct points &amp;lt;math&amp;gt;x,y \in X&amp;lt;/math&amp;gt;, there exists a continuous function &amp;lt;math&amp;gt;f:X \to [0,1]&amp;lt;/math&amp;gt; such that &amp;lt;math&amp;gt;f(x) = 0&amp;lt;/math&amp;gt;, &amp;lt;math&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&amp;gt;&lt;/ins&gt;f(y) = 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;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;&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;==Facts==&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;==Facts==&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
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		<author><name>Vipul</name></author>
	</entry>
	<entry>
		<id>https://commalg.subwiki.org/w/index.php?title=Urysohn_space&amp;diff=1963&amp;oldid=prev</id>
		<title>Vipul: New page: ==Definition==  A topological space &lt;math&gt;X&lt;/math&gt; is termed a &#039;&#039;&#039;Urysohn space&#039;&#039;&#039; if given any two distinct points &lt;math&gt;x,y \in X&lt;/math&gt;, there exists a continuous function &lt;math&gt;f:X \to...</title>
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		<updated>2009-02-06T00:07:18Z</updated>

		<summary type="html">&lt;p&gt;New page: ==Definition==  A topological space &amp;lt;math&amp;gt;X&amp;lt;/math&amp;gt; is termed a &amp;#039;&amp;#039;&amp;#039;Urysohn space&amp;#039;&amp;#039;&amp;#039; if given any two distinct points &amp;lt;math&amp;gt;x,y \in X&amp;lt;/math&amp;gt;, there exists a continuous function &amp;lt;math&amp;gt;f:X \to...&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;
A topological space &amp;lt;math&amp;gt;X&amp;lt;/math&amp;gt; is termed a &amp;#039;&amp;#039;&amp;#039;Urysohn space&amp;#039;&amp;#039;&amp;#039; if given any two distinct points &amp;lt;math&amp;gt;x,y \in X&amp;lt;/math&amp;gt;, there exists a continuous function &amp;lt;math&amp;gt;f:X \to [0,1]&amp;lt;/math&amp;gt; such that &amp;lt;math&amp;gt;f(x) = 0&amp;lt;/math&amp;gt;, &amp;lt;math&amp;lt;f(y) = 1&amp;lt;/math&amp;gt;.&lt;br /&gt;
&lt;br /&gt;
==Facts==&lt;br /&gt;
&lt;br /&gt;
* [[Natural map from topological space to max-spectrum of ring of continuous real-valued functions is an injection iff the space is Urysohn]]&lt;br /&gt;
&lt;br /&gt;
==External links==&lt;br /&gt;
&lt;br /&gt;
===Primary subject wiki link===&lt;br /&gt;
&lt;br /&gt;
* [[Topospaces:Urysohn space]]&lt;/div&gt;</summary>
		<author><name>Vipul</name></author>
	</entry>
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