最近在网上找到许多有趣的文章和lecture notes，因为接近期末周没时间仔细读完，故放置在此。
谱序列：
Clover May Math 237 Spectral Sequences - Spring 2020 at UCLA
书：A User’s Guide to Spectral Sequences
A User’s Guide to Spectral Sequences
肖梁 代数学
HOMOLOGICAL ALGEBRA - LECTURE NOTES
Daniel Dugger
NOTES ON THE MILNOR CONJECTURES
Mike Hill
Computational Methods in Algebraic Topology
如何证明莫比乌斯带的边界圆不是形变收缩核? - Eric的回答 - 知乎 https://www.zhihu.com/question/5265920881/answer/75695841029
O. Randal-Williams Algebraic Topology Notes
有许多计算的例子
https://dec41.user.srcf.net/notes/III_M/algebraic_topology_iii_trim.pdf
以上是Dexter Chua做的笔记，他的笔记主页：https://dec41.user.srcf.net/notes/
Shintaro Fushida-Hardy
Homology 3-spheres
https://stanford.edu/~sfh/homosphere.pdf
Grad school application advice
https://stanford.edu/~sfh/advice.pdf
An Infinitely Large Napkin