Notes
Although it is unlikely to be very useful to anyone at this stage, you can find my informal/inprogress notes wiki here. You can also find my even less organized math journal here.
Lectures and Courses

K3 Surfaces (Phil Engel, Spring 2023)

Hochschild Homology (Tekin Karadag, Spring 2023)

Lie Algebras (Brian Boe, Fall 2022)

Moduli Spaces (Valery Alexeev, Fall 2022)
Algebra
Representation Theory
Algebraic Geometry
Arithmetic Geometry and Number Theory
Topology
Analysis
Undergrad
Talks / Seminars / Mini Courses

IAS/PCMI Graduate Summer School: Motivic Homotopy

Combined Notes

Danny Krashen, “Field arithmetic and the complexity of algebraic objects”

Philippe Gille, “Gtorsors over affine curves”

Frédéric Déglise, “Motivic categories”

Kirsten Wickelgren, “An introduction to $\AA^1$ homotopy theory using enumerative examples”

Matthew Morrow, “Aspects of motivic cohomology”

 Reading Seminar: SalamonMcDuff, “JHolomorphic Curves and Symplectic Topology”

GromovWitten invariants and regularity theorems:


VRG notes on tilings and translation surfaces:

Arizona Winter School, 2019

Kirsten Wickelgren: A1 Enumerative Geometry

Matthew Morrow: Topological Hochschild Homology in Arithmetic Geometry


UCSD Algebraic Geometry Conference, 2019
Expository

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

An expository paper on the history of modern Algebraic Geometry (2017): PDF

Some notes on the Math GRE:

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!
 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.
 Dexter Chua has lecture notes from Cambridge courses.
 Aleksander Shmakov has some notes posted on his website.
 Anton Geraschenko has page of lecture notes.
 Chris SchommerPries has some lecture notes.
 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
 Henry Liu has notes from graduate courses
Resources / Remarks on LiveTexing
Some tools I use:
 I take notes using the neovim editor, manage them with the ranger file manager, and convert them to PDF/HTML with pandoc.
 My vim configuration is here.
 My entire notes respository is stored here.
 I keep a collection of pandoc templates and custom filters here.
 For diagrams:
 Inkscape for capturing freehand stylus drawings while livetexing.
 q.uiver for commutative diagrams in TikzCD.
 https://www.mathcha.io for converting handdrawn stylus figures to Tikz code.
 QTikz/KTikz for plain Tikz or handedited TikzCD.
 For macros:
 I have several (very unorganized) files for Latex macros: a, b, c, d.
 I use a forked version of quicktex to automatically expand 23 letter shortcuts into full commands. My library of shortcuts is here.
 I use coc.nvim and cocsnippets to inline more complicated commands
 I use the iabbrev feature in neovim to automatically correct typos.
Some useful resources:
 I use the mathpix snipping tool to convert clips of images to tex, and their snip notes feature to convert entire PDFs or book pages.
 I keep loose research notes in Obsidian.

The Gummi program has an excellent sidebyside view of tex and the PDF output which regularly updates after you’ve typed.

Gilles Castel has a blog post describing livetexing with vim, along with another post about integrating Inkscape figures
 Chris SchommerPries has written a post on the Secret Blogging Seminar which includes some useful tips and tricks.