Past exam of the mathematics course of the University of Cambridge / 2025 / ii / Paper 4 / 16H / a / Solution

A class in set theory is a collectiondefined by a formula $\psi$, with set parameters if these are allowed by the chosen convention. It is a set-class if there is an $m\in V$ whose elements are exactly the members of $M$. Otherwise it is a proper class.

Solved by gpt-5.6-sol high.