Chartrand - mathematical proofs (if you don’t have background with proofs) Then- Baby Rudin - analysis (first 8 chapters is good) Dummit Foote - algebra (as

Chartrand - mathematical proofs (if you don’t have background with proofs) Then- Baby Rudin - analysis (first 8 chapters is good) Dummit Foote - algebra (as much as you can read, groups, rings, fields, even more if you can) Needham - complex analysis Friedberg - linear algebra After that you can go in many directions Many other interesting courses Number theory Representation theory Probability -> stochastic processes Statistics