Newbetuts

$\exists$ countably generated $\mathcal F$, s.t. $\sigma(\{ \{\omega \}: \omega\in\Omega \}) \subsetneqq \mathcal F \subsetneqq \mathcal B(\Omega)$?

Consistency strength of Turing measurability

The inverse image of dense set is dense and of a comeager set is comeager?.

How do you find the smallest of homeomorphic ordinals?

Hausdorff Quasi-Polish spaces

Can sets of cardinality $\aleph_1$ have nonzero measure?

Why not we avoid the phrase "if we assume AC " and take it as granted?

How to prove that $\mathbb{Q}$ is not the intersection of a countable collection of open sets.

"Nice" well-orderings of the reals

A construction of sigma-algebras - surely not new, right?

What is a Dynkin system? ($\lambda$-system)

Good text to start studying topological games?

Why is the real line not used in Descriptive Set Theory?

Subsets of the Cantor set

Is there a set $A \subset [0,1]$ such that both $A$ and $[0,1] \setminus A$ intersect every positive-measure set?

How to show the diagonal of product of Hausdorff spaces is not in the product of its Borel-$\sigma$ algebras?

Spanning the reals with a small set - choicelessly

New posts in descriptive-set-theory

Continuous surjections onto $\mathbb{R}$

Constructing a choice function in a complete & separable metric space

How does Borelness overlap with definability, computability, or constructiveness?

$\exists$ countably generated $\mathcal F$, s.t. $\sigma(\{ \{\omega \}: \omega\in\Omega \}) \subsetneqq \mathcal F \subsetneqq \mathcal B(\Omega)$?

Consistency strength of Turing measurability

The inverse image of dense set is dense and of a comeager set is comeager?.

How do you find the smallest of homeomorphic ordinals?

Hausdorff Quasi-Polish spaces

Can sets of cardinality $\aleph_1$ have nonzero measure?

Why not we avoid the phrase "if we assume AC " and take it as granted?

How to prove that $\mathbb{Q}$ is not the intersection of a countable collection of open sets.

"Nice" well-orderings of the reals

A construction of sigma-algebras - surely not new, right?

What is a Dynkin system? ($\lambda$-system)

Good text to start studying topological games?

Why is the real line not used in Descriptive Set Theory?

Subsets of the Cantor set

Is there a set $A \subset [0,1]$ such that both $A$ and $[0,1] \setminus A$ intersect every positive-measure set?

How to show the diagonal of product of Hausdorff spaces is not in the product of its Borel-$\sigma$ algebras?

Spanning the reals with a small set - choicelessly