Let V be a subset of X. a) Prove that V is open in X if and
Question:
a) Prove that V is open in X if and only if there is a collection of open balls {Ba: a ˆˆ A} such that
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b) What happens to this result if open is replaced by closed?
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a Given x V choose x 0 such that B x V Then V xV B x On ...View the full answer
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