A proper class cannot be element of a set or a class and is not subject to the Zermelo-Fraenkel axioms of set theory; thereby a number of paradoxes of naive set theory, such as Russells paradox, are avoided. |
A proper class cannot be element of a set or a class and is not subject to the Zermelo-Fraenkel axioms of set theory; thereby a number of paradoxes of naive set theory, such as Russells paradox, are avoided. |