I did my homework assignment by adding many more definitions to the section that starts on page 6. It is hard to know where to stop. If you see that somethig is missing, lease add it. Of course, comments are welcome on my additions. https://docs.google.com/document/d/1PAG8kh4Jg_6BNMbkqebVpyqebw5mPjXr3ie-4rg210w Russ