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Homework Help: Set theory - expression describing subset

  1. Mar 4, 2010 #1
    1. The problem statement, all variables and given/known data
    I have two sets E and L.
    I have to show that E is a subset of L, using only complement, union and the empty set.
    I.e. all members of E also have to be members or L, but L may contain members not included in E.

    2. Relevant equations

    3. The attempt at a solution
    Am I right in describing it thus:
    complement(complement(E) union L) = Ø

    Any help is appreciated.

  2. jcsd
  3. Mar 4, 2010 #2

    Gib Z

    User Avatar
    Homework Helper

    Its quite easy to work out or check your answers if you draw up a Venn Diagram =]
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