Hajnal A., Hamburger P. Set Theory

Cambridge University Press, 1999. — 323 p.This textbook was prepared on the basis of courses and lectures by Andras Hajnal for mathematics majors at Roland Eotvos University in Budapest, Hungary. The first edition appeared in 1983; since then the book went through a number of new printings and editions. During each of these, new problems were added and the historical remarks were updated. A number of revisions have also been made in the present, the first English, edition.
A significant one among these is that hints were added for the problems in Part II, and a completely new section (Section 20) discusses the so-called square-bracket symbol.