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Unformatted text preview: Y P = u A f1 ( Y ) , f1 p i A Y P = i A f1 ( Y ) . 3. ind a bijection from N to N 2 . 4. Construct a sequence of open sets U n ( n = 1 , 2 , . . . ) of R such that n =1 U n is not open. 5. Prove the statements ii, iii, and iv on Page 13 of the textbook....
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This note was uploaded on 12/11/2011 for the course MATH 240a taught by Professor Rothschild,l during the Fall '08 term at UCSD.
 Fall '08
 Rothschild,L
 Sets

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