The Oxford mathematics Moodle has detailed course listings, and most PDFs are not paywalled.
E.g. the 2024 course:
Sphere Updated 2025-07-16
Typography Updated 2025-07-16
Breaking Bad Updated 2025-07-16
There is a lot of "who kills who" useless fluff, and everything to do with the wife is boring, but too much gold otherwise.
It is amazing to see how seasons got better and better until the finale. The last season was amazing, Ciro Santilli actually watched all episodes of that one! This is clearly seen on the evolution of metacritic scores.
Rho Updated 2025-07-16
This one is a little confusing: the upper case looks exactly like a letter P, but as the name suggests, it actually corresponds to the letter R. The letter P corresponds to pi instead.
General linear group Updated 2025-07-16
Invertible matrices. Or if you think a bit more generally, an invertible linear map.
When the field is not given, it defaults to the real numbers.
Non-invertible are excluded "because" otherwise it would not form a group (every element must have an inverse). This is therefore the largest possible group under matrix multiplication, other matrix multiplication groups being subgroups of it.
RimWorld Updated 2025-07-16

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