Subjects / Set theory
Best books to learn Set theory, in order
Set theory is both the informal language everyone uses and a rigorous axiomatic subject, and conflating the two causes confusion. A good path starts with naive set theory as a working vocabulary, then moves deliberately to the axioms, where the paradoxes force precision, and reaches ordinals, cardinals, and the transfinite once you accept why the axioms are needed.
Reading paths for set theory
Learn set theory: the best books in order
Beginner8books69 hrs4 stages