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September 14th, 2010, 06:26 PM   #1
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one prove question

Let A and C be subset of with boundaries B(A), B(C) respectively. Prove or disprove:
(1) B(AUC) = B(A)UB(C)
(2) B(AC) = B(A)B(C)
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September 15th, 2010, 04:35 AM   #2
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Re: one prove question

Part (b) is really very easy - just pick any two intersecting, unequal sets and see what happens.

For part (a), you can find a counterexample by picking two strict subsets of whose union is the whole of
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