Test 1 on Thursday Sept. 27.
----------------------------

Turn in answers for the following questions
on Thursday September 27.

Policy:  Students may help each other, as long as this
help does not consist of simply copying the answer.
Students are also encouraged to ask help from me.

What is important is that by the time you turn in your
work, that at that time you are able to do these questions
on your own.
To test this, there will be a brief test on September 27.
Your grade for test 1 will be based on the work you
turn in, in combination with the test on that day itself.


1.2 Ex. 2.

1.3 Ex. 11 (you may find useful hints in section 2.3).

1.4 Ex. 3.

1.5 Ex. 1.

1.6 Ex. 4.  (hint: count number of elements of
            some finite order  n>2).

    Ex. 17.

    Ex. 19.

    Ex. 23. (hint: prove that map x -> x^(-1)*sigma(x)
            is 1-1.  Then use Ex. 17).


1.7 Ex. 14, 15.

2.1 Ex. 4.

2.2 Ex. 10.

2.3 Ex. 24.