Von Neumann-Bernays-Gödel Set Theory (NBG) is an extension of set theory that allows for a foundational exploration of sets and classes, incorporating a class comprehension axiom and providing a framework for treating proper classes as well as sets.
Von Neumann-Bernays-Gödel Set Theory (NBG) is an extension of set theory that allows for a foundational exploration of sets and classes, incorporating a class comprehension axiom and providing a framework for treating proper classes as well as sets.