1. Sep 27, 2012 #1

   Bashyboy

   

   What is the difference between using ⊂ and ⊆? My book was not particularly lucid on this topic.

    

   Bashyboy, Sep 27, 2012
2. 
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3. Sep 27, 2012 #2

   micromass

   

   Insights Author

   Depends on the author. Usually, the two notations mean the same thing, that is: [itex]A\subset B[/itex] or [itex]A\subseteq B[/itex] means that all elements in A are also in B.
   
   Other authors (but a minority!) use [itex]A\subset B[/itex] to mean that A is a subset of B but A is not equal to B.
   
   You should check your book to see which convention he uses.

    

   micromass, Sep 27, 2012

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