>>12777152learn the basics of linear algebra in a week, study in parallel fraleighs first course in abstract algebra, Abbotts understanding analysis and read a book on naive set theory until ordinal theory at the very least
study zorich's analysis or Pugh for advanced topics (multivariate analysis)
then proceed with advanced linear algebra, munkres topology, a good book on probability and statistics (grimmet for example)
finally read some book on galois theory (if you want), functional analysis and measure theory, and complex analysis (alfols or whatever)
