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Does set A equal to set B ? where $$ A= \{ \emptyset, a,b,c \} $$ $$ B=\{ a,b,c \} $$

second question: I know the order of the elements does not matter in a Set. But i once read about the order of elements(or subset) matters in some case, and i can't remember what it is.

Some help from you guys would be nice. Thanks

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    If one or more of $a$, $b$, $c$ is the empty set, then the two sets are the same. Otherwise they are not.2012-11-25

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