ABSTRACT
This text assumes that the reader is familiar with abelian groups and unital modules over associative rings with unity as contained in the texts by F.W. Anderson and K.R. Fuller [6], D.M. Arnold [10], and L. Fuchs [46]. We will reference but not prove those results that we feel fall outside of the line of thought of this book. I suggest that you use this chapter as a reference and nothing more. Skim through this chapter. Unless otherwise directed, do not attempt to plow through these results as though they were exercises.
