Sec. 7, 9.3-9.4, Due February 27

One to one and onto functions seem easy enough.  The main difficulty I foresee myself having is with onto functions.  The example in the reading that made this most clear was a function from the integers to the integers defined by 2n.  For a while I did not see why it was not considered an onto function, but then it became clear that it was due to the domain, and so the output of the function was limited to the even  integers.