ABSTRACT
In this closing chapter we intend to touch on a number of topics that are related to the study of isometries in some way, or isometry results that we have not taken time to consider in the previous chapters. There will be few proofs here, but rather, a brief explanation of the subject, a few important results, and a guide for further investigation. The topics are covered in no particular order, and we may rely on only two or three principal sources, leaving it to the reader to find other contributors from the reference lists.
