This is the webpage for my spring 2023 section of Math 128 (homological algebra).

The syllabus is posted here.
version replaced 5/8 available here (updates to grading scheme)

The most up-to-date lecture notes will always be posted here. (They are an updated version of the lecture notes posted here -- the webpage for a previous iteration of the same course.)

As explained in the lecture notes, significant modifications to previously posted portions thereof are temporarily color-coded and labeled by their date of appearance so that they are easy to spot. In case you fall behind, it may therefore be helpful to look back through the older lecture notes, which are posted here: 4/3, 4/5, 4/7, 4/10, 4/12, 4/14, 4/17, 4/19, 4/21, 4/24, 4/26, 4/28, 5/1, 5/3, 5/5, 5/8, 5/10, 5/12, 5/15, 5/17, 5/19, 5/22, 5/24, 5/26, 5/31, 6/2.