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Sep 15, 2021 at 7:19 comment added Martin Sleziak This seems to be a bit similar question to this one: "Kuratowski-Mrówka theorem" Need reference This question only asks about one implication, but some of the answers mention that it is in fact a characterization: Projection map being a closed map.
Sep 13, 2021 at 10:10 answer added Nik Weaver timeline score: 4
Sep 13, 2021 at 6:07 answer added KP Hart timeline score: 5
Sep 12, 2021 at 8:36 review Close votes
Sep 15, 2021 at 7:13
Sep 12, 2021 at 7:57 comment added red_trumpet I guess that has to do with the properness of $X \times Y \to Y$?
Sep 12, 2021 at 7:46 history edited YCor CC BY-SA 4.0
edited tags, formatting
Sep 12, 2021 at 7:28 history edited AGenevois CC BY-SA 4.0
edited title
S Sep 12, 2021 at 7:22 review First questions
Sep 12, 2021 at 13:00
S Sep 12, 2021 at 7:22 history asked Fuutorider CC BY-SA 4.0