Why is the empty set a subset of any set? Are infinite sets,equivalent sets? What are joint sets & deijoint sets? What are the ways of describing a set & their examples?

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- Jun 20th 2005, 05:13 AMSittieI nid an urgent answer please..........
Why is the empty set a subset of any set? Are infinite sets,equivalent sets? What are joint sets & deijoint sets? What are the ways of describing a set & their examples?

- Dec 28th 2005, 09:32 AMMathGuru
The empty Set is a subset of every set because it contains nothing and every set can be said to contain nothing plus whatever it contains.