If A x B = empty set then A = empty set or B = empty set.

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- Dec 2nd 2008, 08:18 AMmbcsantinProve or find counterexamples
If A x B = empty set then A = empty set or B = empty set.

- Dec 2nd 2008, 08:23 AMvincisonfire
What is the "x"?

Is it intersection? union?

Are A and B groups, sets, rings? - Dec 2nd 2008, 08:33 AMmbcsantin
- Dec 2nd 2008, 08:42 AMPlato