Recent content by fgoodman

Yes, that proof of the multiplicativity of the Euler function is given in Example 3.1.4. I'm no longer sure why I arranged things as I did, but apparently I wanted to introduce counting methods as part of algebra, which I could do in chapter 1 without building up any machinery. By the way...

You could try my book Algebra: Abstract and Concrete at http://www.math.uiowa.edu/~goodman/algebrabook.dir/algebrabook.html Fred Goodman