8

Questions
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4
votes
1
answer
68
views

About infinite subset of halting probability and 1-random set

jun 13 at 1:52 Zhang Jing 351●1●2●6

 
4
votes
1
answer
183
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Non-standard model of the domination principle

may 18 at 10:22 Zhang Jing 351●1●2●6

 
2
votes
3
answers
286
views

Indices of r.e. sets

mar 17 at 12:14 Zhang Jing 351●1●2●6

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2
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1
answer
160
views

$\Sigma_1^0-COH$?

feb 16 at 22:01 François G. Dorais♦ 23.1k●2●52●116

 
6
votes
1
answer
151
views

Cohesive sets with degree below some non-high 1-generic degrees?

apr 4 at 16:52 Zhang Jing 351●1●2●6

 
9
votes
2
answers
415
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Borel sets preserved under open maps?

sep 11 at 21:58 Gerald Edgar 15.4k●1●29●67

 
3
votes
1
answer
202
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Proof of the existence of hyperimmune-free degrees

jan 12 at 9:12 Peter Gerdes 181●2

 
1
vote
1
answer
276
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Absoluteness of Countability

jun 23 at 16:23 Zhang Jing 351●1●2●6