New posts in Descriptive Set Theory

Cardinality of the borel measurable functions?

Analytic versus Analytical Sets

Continuous functions are differentiable on a measurable set?

Cardinality of Borel sigma algebra

What is the cardinality of the set of all topologies on $\mathbb{R}$?

Polish space in which the interior of each compact set is empty

Subsets of the Cantor set

Cantor space: example of an open set that's not closed?

Countable compact spaces as ordinals

Homeomorphisms and "mod finite"