set theory
BRANCH OF MATHEMATICS THAT STUDIES SETS, WHICH ARE COLLECTIONS OF OBJECTS
Axiomatic Set Theory; SetTheory; Set Theory; Formal set theory; Axiomatic set theory; Theory of sets; Ordinary set theory; Set theorist; Classical set theory; Set-theoretic; Axioms of set theory; Axiom of set theory; Axiomatic set theories; Transfinite set theory; Abstract set theory; Mathematical set theory; Set theory (mathematics); Applications of set theory; History of set theory
Gruppentheorie (Mathematik)