There is no set of all [compact] topological spaces.
Given a set of topological spaces, consider the power set of its union. This power set with the indiscrete topology is a compact topological space missing from the set.
There is no set of all [compact] topological spaces.
Given a set of topological spaces, consider the power set of its union. This power set with the indiscrete topology is a compact topological space missing from the set.