Timeline for $\mathcal{C}$-filtering of modules inherited by submodules
Current License: CC BY-SA 4.0
8 events
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| Aug 8, 2019 at 20:30 | comment | added | Asaf Karagila♦ | Well, in the proof that $\lozenge$ implies that every Whitehead group is free there is a characterization of what and where things fail. To my understanding that was the origin of club guessing, too. | |
| Aug 8, 2019 at 19:09 | comment | added | Sean Cox | I would be interested in knowing if Whitehead groups of size $\omega_1$ can be characterized by strong $\mathcal{C}$-filtering, for some $\mathcal{C}$ that satisfies the requirements of the question (assuming we're in a universe where there is a non-free Whitehead group, of course). | |
| Aug 8, 2019 at 16:43 | comment | added | Asaf Karagila♦ | Whitehead's Problem comes to mind... | |
| Aug 8, 2019 at 13:22 | history | edited | Sean Cox | CC BY-SA 4.0 |
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| Aug 7, 2019 at 22:54 | history | edited | Sean Cox | CC BY-SA 4.0 |
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| Aug 7, 2019 at 19:59 | history | edited | Sean Cox | CC BY-SA 4.0 |
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| Aug 7, 2019 at 18:51 | history | edited | Sean Cox | CC BY-SA 4.0 |
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| Aug 7, 2019 at 18:46 | history | asked | Sean Cox | CC BY-SA 4.0 |