Ask HN: Which are the best self study materials for learning mathematics?

[debanjan16]

If you have self learned any topic from mathematics either from books or from online courses, can you share a list of them and why do you think they are great?

There are such lists for CS but very few for mathematics.

[lurknot]

found this when i searched HN asking the same question

https://www.susanrigetti.com/math