WRT math topics: probably Calculus and linear algebra.
I will look into the proofs book you recommended. Thanks.
I will look into the proofs book you recommended. Thanks.
You can also cover linear algebra without proofs.
There are, of course, books that do cover proofs for calculus and linear algebra, but it depends on what you’re trying to get out of the material.
I should have listed proofs as a third topic.