« first day (1607 days earlier)   

1:28 AM
15
Q: The class of all classes not containing themselves

Mozibur UllahIn ZF classes are used informally to resolve Russells Paradox, that is the collection of all sets that do not contain themselves does not form a set but a proper class. But doesn't the same paradox manifest itself when discussing the class of all classes that do not contain themselves?

 

« first day (1607 days earlier)