Timeline for $\Delta^{1}_{2}$ and degrees of constructibility $\textbf{on sets}$
Current License: CC BY-SA 4.0
10 events
| when toggle format | what | by | license | comment | |
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| Oct 31, 2018 at 8:18 | history | edited | 喻 良 | CC BY-SA 4.0 |
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| Oct 31, 2018 at 5:35 | history | edited | 喻 良 | CC BY-SA 4.0 |
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| Oct 31, 2018 at 5:19 | comment | added | 喻 良 | Ah, you are right. | |
| Oct 30, 2018 at 19:39 | comment | added | Danielle Ulrich | I believe you are misinterpreting the question. We are looking at the constructible degrees of the hereditarily countable sets; note for instance that not every hereditarily countable set need have the same degree as a real. | |
| Oct 30, 2018 at 14:59 | history | edited | 喻 良 | CC BY-SA 4.0 |
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| Oct 30, 2018 at 2:10 | history | edited | 喻 良 | CC BY-SA 4.0 |
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| Oct 30, 2018 at 2:03 | history | edited | 喻 良 | CC BY-SA 4.0 |
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| Oct 30, 2018 at 1:52 | history | edited | 喻 良 | CC BY-SA 4.0 |
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| Oct 30, 2018 at 1:41 | history | edited | 喻 良 | CC BY-SA 4.0 |
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| Oct 30, 2018 at 1:22 | history | answered | 喻 良 | CC BY-SA 4.0 |