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## Homework Statement

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.

## Homework Equations

## The Attempt at a Solution

Am I right in describing it thus:

complement(complement(E) union L) = Ø

Any help is appreciated.

Sincerely,

tsrgb