Unformatted text preview: f ◦ g = I B . Give an example of nonempty sets A and B and functions f : A → B and g : B → A such 3. that g ◦ f = I A but f ◦ g 6 = I B . [Hint: The ﬁrst two problems seriously restrict the possible choices for f and g .]...
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This note was uploaded on 01/31/2011 for the course MATH 300 taught by Professor Ctw during the Spring '08 term at Rutgers.
 Spring '08
 ctw
 Math, Sets

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