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\centerline{\bf HW \#5}
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\centerline {\bf Math 506A}
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\noindent 1. (20 points) DF, Exercise 2, p. 791.
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\noindent 2.  (20 points) DF, Exercise 1, p. 809 ({\sl correction}: the map labelled aug should be $\epsilon$).  
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\noindent 3.  DF, Exercise 9, p. 811.
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