Tarski made contributions to algebra, measure theory, mathematical logic, set theory and metamathematics. See Truth for a brief description of the "Convention T" standard in his "inductive definition of truth": an important contribution to symbolic logic and the philosophy of language.
External link: MacTutor (http://www-groups.dcs.st-and.ac.uk/~history/Mathematicians/Tarski.html) article by J J O'Connor and E F Robertson
wikipedia.org dumped 2003-03-17 with terodump