Learn a new theorem in homological algebra and communicate it in
written form.
Requirements
Each student will focus on a different result.
The written document will introduce/motivate, correctly state, and
prove a theorem. It will also include at least one interesting
example, construction, or special case illustrating the theorem. The
article will be as self-contained as possible. The new document must
be typed, about eight pages in length (with one inch margins and
a 12pt font), and be available in PDF format. By design, this
assignment is very open-ended.