If you're doing it for programming, number theory, linear algebra, graph theory, and abstract algebra are important in certain domains. It's good to be able to prove things inductively as ...

Homological algebra and representation ... In parallel, representation theory focuses on realising abstract algebraic entities as linear transformations on vector spaces, offering concrete ...

Basic linear algebra methods including basic matrix/vector operations ... least squares and data fitting, game theory, graph theory, principal component analysis, linear programming, and other related ...