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Timeline for Properness for small forcings

Current License: CC BY-SA 4.0

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Mar 12, 2021 at 12:30 vote accept Rahman. M
Mar 12, 2021 at 12:20 answer added Mohammad Golshani timeline score: 3
Dec 13, 2020 at 10:43 comment added Mohammad Golshani Maybe related: Collapsing ω2 with semi-proper forcing
Dec 13, 2020 at 10:12 comment added Rahman. M Yep, that universal answer! you can even prove more
Dec 13, 2020 at 9:53 comment added Asaf Karagila If you replace $\aleph_1$ by $\aleph_0$, then there is a simple answer.
S Dec 13, 2020 at 8:25 history edited Rahman. M CC BY-SA 4.0
Fixed capitalization
S Dec 13, 2020 at 8:25 history suggested Master CC BY-SA 4.0
Fixed capitalization
Dec 13, 2020 at 1:44 review Suggested edits
S Dec 13, 2020 at 8:25
Dec 12, 2020 at 0:47 history asked Rahman. M CC BY-SA 4.0