Talk:List of unsolved problems in mathematics

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Set theory note[edit]

There was a 2021 edit at the start of the set theory section that reads a little odd. It reads

Note: These conjectures are about models of Zermelo-Frankel set theory with choice, and may not be able to be expressed in models of other set theories such as the various constructive set theories or non-wellfounded set theory.

Given any FOL Set theory (many here List_of_first-order_theories#Set_theories) with the same signature (the bulk just works with \in and not more), a problem expressed in the language is the same for any of them. What's probably meant here is (and that's my proposed replacement)

The notable conjectures in the subject of set theory were typically formulated in the context of Zermelo-Frankel set theory, and usually with Choice. By the completeness theorem, the problems may be understood as concerning the models thereof. The provability of the conjectures listed below might not be open in other set theories, such as ones over a logic or with axioms that are weaker, stronger or conflicting with it (e.g. a constructive set theory, Tarski-Grothendieck set theory resp. a non-wellfounded set theory.)

In fact the middle sentence mentioning models is probably even redundant also.

--178.115.55.162 (talk) 17:15, 21 November 2023 (UTC)[reply]

Change in section title[edit]

"Problems solved since 1995" was recently changed to "problems solved in the last 30 years". I think the former title should be used. See Wikipedia:Manual_of_Style/Dates_and_numbers#Statements_likely_to_become_outdated. Bubba73 ^{You talkin' to me?} 01:52, 20 January 2024 (UTC)[reply]

Based on the MoS outline, agreed. GalacticShoe (talk) 02:14, 20 January 2024 (UTC)[reply]

Done Klbrain (talk) 18:51, 22 February 2024 (UTC)[reply]