My impression of sites like brilliant.org or Khan Academy (or the Math Academy mentioned in another post here, which sounds like an absolutely brilliant resourc

My impression of sites like brilliant.org or Khan Academy (or the Math Academy mentioned in another post here, which sounds like an absolutely brilliant resource for curious high school students) is that they're geared towards "pre-university" math, which is decidedly different from the mathematics in a university curriculum. Really just different, not even necessarily easier, because it's focused a lot on "mechanical" computations, which can get really gnarly, versus the more "intuitive" proof-based courses at university (tbf, you still have to master the gnarly mechanical topics at university, but you'll also have markedly different courses from the start, and their prominence just grows the further you go). The best places that I am aware of for self-studying university-level math are university websites (like MIT OCW) or just going through undergrad textbooks on your own. Someone made an imho decent guide for the latter [0], curious if HN users have other recommendations. [0] https://www.quantstart.com/articles/How-to-Learn-Advanced-Mathematics-Without-Heading-to-University-Part-1/ https://www.quantstart.com/articles/How-to-Learn-Advanced-Ma...