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	<title>Vietoris topology - Revision history</title>
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	<updated>2026-06-06T19:02:24Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://topospaces.subwiki.org/w/index.php?title=Vietoris_topology&amp;diff=4446&amp;oldid=prev</id>
		<title>Vipul: Created page with &quot;==Definition==  The &#039;&#039;&#039;Vietoris topology&#039;&#039;&#039; is a topology defined on the set of all non-empty subsets of a topological space based on the topology on the original topo...&quot;</title>
		<link rel="alternate" type="text/html" href="https://topospaces.subwiki.org/w/index.php?title=Vietoris_topology&amp;diff=4446&amp;oldid=prev"/>
		<updated>2012-12-21T00:01:42Z</updated>

		<summary type="html">&lt;p&gt;Created page with &amp;quot;==Definition==  The &amp;#039;&amp;#039;&amp;#039;Vietoris topology&amp;#039;&amp;#039;&amp;#039; is a &lt;a href=&quot;/w/index.php?title=Topology&amp;amp;action=edit&amp;amp;redlink=1&quot; class=&quot;new&quot; title=&quot;Topology (page does not exist)&quot;&gt;topology&lt;/a&gt; defined on the set of all non-empty subsets of a &lt;a href=&quot;/wiki/Topological_space&quot; title=&quot;Topological space&quot;&gt;topological space&lt;/a&gt; based on the topology on the original topo...&amp;quot;&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;
The &amp;#039;&amp;#039;&amp;#039;Vietoris topology&amp;#039;&amp;#039;&amp;#039; is a [[topology]] defined on the set of all non-empty subsets of a [[topological space]] based on the topology on the original topological space. The topology is defined by the following [[basis]]:&lt;br /&gt;
&lt;br /&gt;
{{quotation|For every non-empty finite collection of non-empty open subsets &amp;lt;math&amp;gt;U_1,U_2,\dots, U_n&amp;lt;/math&amp;gt; in &amp;lt;math&amp;gt;X&amp;lt;/math&amp;gt;, the corresponding basis element is the set of all non-empty subsets &amp;lt;math&amp;gt;A&amp;lt;/math&amp;gt; of &amp;lt;math&amp;gt;X&amp;lt;/math&amp;gt; for which &amp;#039;&amp;#039;all&amp;#039;&amp;#039; the intersections &amp;lt;math&amp;gt;A \cap U_i&amp;lt;/math&amp;gt; are non-empty.}}&lt;/div&gt;</summary>
		<author><name>Vipul</name></author>
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