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If A is contained in B, then the interior of A is contained in B.
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lanedance
#
8
Sep30-10, 08:10 PM
HW Helper
P: 3,307
another similar counter example, what if B is the union of A with a discrete point not contained in any neighbourhood of A
then doesn't
int(A) = int(B)
can you write the question
exactly
as it was stated?