Stats: 1933 pages since August 2019
Fall 2019: 312 pages.
 Algebra: 104p
 Real Analysis 116p
 Lie Algebras: 92p
Spring 2020: 510 pages
 Morse Theory: 72p
 Commutative Algebra: 76p
 Complex Analysis: 79p
 Category $\OO$: 96p
 Elliptic Curves: 74p
 Moduli Spaces: 113p
Summer 2020: 39 pages.
 Categorification: 39p
Fall 2020: 524 pages
 Étale cohomology: 96p
 Algebraic Geometry: 129p
 Algebraic Curves: 127p
 Algebraic Groups: 172p
Spring 2021: 548 pages.
 Number Theory: 97 p
 Floer Homology: 161p
 Homological Algebra: 152p
 4Manifolds: 138p
Notes
Lectures and Courses
Arithmetic Geometry and Number Theory
Algebraic Number Theory
Algebraic Curves
Étale Cohomology
Algebraic Geometry
Algebraic Geometry
Moduli Spaces
4Manifolds and Algebraic Surfaces
Representation Theory
Algebraic Groups
Topology
Floer Homology
Algebra
Homological Algebra
Analysis
Undergrad
Talks / Seminars / Mini Courses

Kirsten Wickelgren: A1 Enumerative Geometry (Arizona Winter School, 2019)

Matthew Morrow: Topological Hochschild Homology in Arithmetic Geometry (Arizona Winter School, 2019)
Expository

A note on motivating and using semidirect products to classifying finite groups: PDF

Classifying groups of order $pq$ using semidirect products: PDF

An expository paper on the history of modern Algebraic Geometry (2017): PDF
Misc
 My PDF annotations for math textbooks.
 My grad school math journal.
 My mathrelated Twitter threads on Thread Reader.
Links to Notes by Others
Note: If you you write and share LaTeX notes, please let me know and I’d be happy to link your site here!
 Aleksander Shmakov has some notes posted on his website.
 Arun Debray maintains a page of lecture notes.
 Gilles Castel maintains a page of lecture notes .
 Evan Chen maintains a page of lecture notes, along with The Infinite Napkin.
 Anton Geraschenko has page of lecture notes.
 Chris SchommerPries has some lecture notes.
 Dexter Chua has lecture notes from Cambridge courses.
 Dongryul Kim has uploaded a large collection of livetex’d notes from Harvard courses.
 Zoë Farmer has some notes from various undergraduate courses
 Akhil Matthew has some notes from graduate courses
Resources / Remarks on LiveTexing
Forthcoming section: I will post some technical details about my own livetexing setup here in the future for those who are interested.
Some useful resources:

The Gummi program has an excellent sidebyside view of tex and the PDF output which regularly updates after you’ve typed. I think it is also compatible with SyncTex, so may support keeping the scroll positions synced as well.

Gilles Castel has a blog post describing livetexing with vim, along with another post about integrating Inkscape figures
 Yichuan Chen has an excellent online GUI for generating TikzCD code.

https://www.mathcha.io supports handdrawing pictures with a stylus and exporting as Tikz code.
 Chris SchommerPries has written a post on the Secret Blogging Seminar which includes some useful tips and tricks.
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