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\def\title{Homework 7, April 9}
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\bs  

These problems are due Monday, April 23.  Forget about exam problem 3!
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Do p.~198: 1, (2), (3), (4), 5, 6, (7), (8), (9), 10, (11), 14.
The exercises in parentheses are to be turned in only if you are uncertain
whether you got the correct answer or whether you could answer it in an oral
exam.

\bs


\bs
The following exam question is to be done independently.
\bs

{\bf Exam Problem 4:}
Show that if $R$ is a principal ideal domain, then the group $K_1(R)$ is
generated by the image of $\Gl_2(R)$ in it.

\bye


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