User 喻良 - MathOverflow

20 votes

1 answer

1k views

About $\omega_1^{CK}$

asked Nov 9, 2017 at 8:12

14 votes

2 answers

1k views

Decomposing $\mathbf{\Pi}^1_1$ sets into closed sets

asked May 11, 2012 at 3:26

12 votes

0 answers

465 views

A question concerning model theory of groups

asked Mar 25, 2016 at 22:54

11 votes

1 answer

428 views

Concerning Silver's result

asked Aug 18, 2013 at 7:53

10 votes

0 answers

371 views

Concerning Luzin-(N)-property

asked Jun 8, 2019 at 2:18

9 votes

1 answer

688 views

Extending an infinite simple group

asked Oct 30, 2015 at 8:58

9 votes

1 answer

339 views

Minimal cover v.s random reals

asked Mar 3, 2017 at 13:01

8 votes

1 answer

395 views

$\Delta^1_2$-well ordering vs $\Delta^1_3$

asked Dec 15, 2012 at 16:46

8 votes

0 answers

218 views

The Hausdorff dimension of the set of reals of inner models

asked Jan 18 at 23:42

7 votes

1 answer

336 views

Uniformization under AD

asked Jul 7, 2021 at 9:23

6 votes

1 answer

453 views

Demuth's theorem in set theory

asked May 26, 2014 at 9:19

5 votes

1 answer

868 views

Countable admissible ordinals

asked Apr 5, 2012 at 2:58

5 votes

0 answers

776 views

ZFC+``every analytical set is measurable"

asked Apr 26, 2012 at 6:31

5 votes

0 answers

194 views

A slight extension of Sacks theorem

asked Jul 22, 2019 at 8:19

5 votes

1 answer

294 views

Continuity of real functions

asked Jun 29, 2021 at 6:01

4 votes

0 answers

400 views

Perfect subset of a non-null set

asked Aug 8, 2021 at 0:18

4 votes

1 answer

180 views

A partial relativization of Gandy's basis theorem

asked Jul 17, 2019 at 12:32

3 votes

2 answers

507 views

Lehmer’s totient problem

asked Feb 27, 2019 at 5:51

3 votes

1 answer

149 views

Analytic sets and Turing determinacy

asked Jun 21, 2021 at 8:54

2 votes

1 answer

206 views

The measure of ideals generated by random reals

asked Mar 3, 2020 at 13:25

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20 Questions

About $\omega_1^{CK}$

Decomposing $\mathbf{\Pi}^1_1$ sets into closed sets

A question concerning model theory of groups

Concerning Silver's result

Concerning Luzin-(N)-property

Extending an infinite simple group

Minimal cover v.s random reals

$\Delta^1_2$-well ordering vs $\Delta^1_3$

The Hausdorff dimension of the set of reals of inner models

Uniformization under AD

Demuth's theorem in set theory

Countable admissible ordinals

ZFC+``every analytical set is measurable"

A slight extension of Sacks theorem

Continuity of real functions

Perfect subset of a non-null set

A partial relativization of Gandy's basis theorem

Lehmer’s totient problem

Analytic sets and Turing determinacy

The measure of ideals generated by random reals