Proper subset
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Revision 2058
8/22/2026, 5:24:24 PM · Catalpa
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aliasesNonestrict subset
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A [[Subset|subset]] $A$ of a set $B$ is said to be proper if it is different from $B$.1
A [[Subset|subset]] $A$ of a set $B$ is said to be proper if it is different from $B$. In other words, $A$ is included in $B$ but not the contrary; $A$ is strictly included in $B$.Revision 410
7/10/2026, 9:17:13 PM · Ancient Tree
Concept edited
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A proper subset is...1
A [[Subset|subset]] $A$ of a set $B$ is said to be proper if it is different from $B$.Revision 345
7/8/2026, 9:59:24 AM · Ancient Tree
Concept created
A proper subset is...