Talk:List of unsolved problems in mathematics
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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)
- Based on the MoS outline, agreed. GalacticShoe (talk) 02:14, 20 January 2024 (UTC)
Semi-protected edit request on 17 June 2024
edit | This edit request has been answered. Set the |answered= or |ans= parameter to no to reactivate your request. |
i want to add an unsolved math question which is (12 45 ∏ 61
35)! 2601:603:4C7F:B6D0:68E7:C8AD:7A34:6A7 (talk) 17:07, 17 June 2024 (UTC)
- What does it mean? —Tamfang (talk) 23:49, 17 June 2024 (UTC)
Not done for now: Critical lack of explanation why this should be included in the list, and no sources. ABG (Talk/Report any mistakes here) 23:55, 17 June 2024 (UTC)
Removal of solved problems from the unsolved section
editLike the Erdős-Heilbronn conjecture. 2405:201:5502:C989:D1F5:2160:CCE8:4F0A (talk) 05:16, 15 July 2024 (UTC)
Done Any other ones you noticed? GalacticShoe (talk) 06:34, 15 July 2024 (UTC)
2 new conjectures
editThe conjecture asks, whether Graham's number - 4 is a prime.
Graham's number: a power of 3
Graham's number - 1: even
Graham's number - 2: a multiple of 5
Graham's number - 3: an even multiple of 3
Graham's number - 4: unknown
2. repunit power conjecture
There are infinitely many cubes of the form 3 mod 4.: 27, 343, 1331, 3375, 6859, 12167, 19683, 29791, 42875, 59319, 79507, 103823, 132651, 166375, 205379, ... (A016839)
There are infinitely many fifth powers of the form 3 mod 4.: 243, 16807, 161051, 759375, 2476099, ... (A016841)
This goes on with any odd exponent.
So, the conjecture asks, whether a repunit other than 1 can be equal to an, where a is an integer and n is odd and greater than 1.
It is sure, that a repunit other than 1 can never be a square, because squares can never be of the form 3 mod 4, while repunits other than 1 are always of the form 3 mod 4. 94.31.89.138 (talk) 19:53, 28 July 2024 (UTC)
- This is not the place to pose new conjectures. All content here, as in all Wikipedia articles, must be based on reliably-published sources. If you have citations for sources for conjectures to be added, they can be listed here. If not, then they need to be published elsewhere before they can be considered here. —David Eppstein (talk) 20:28, 28 July 2024 (UTC)
Possible equivalents of the axiom of choice
editAdd the open problems from here, including whether PP implies AC, whether WPP implies AC, and whether the Schröder–Bernstein theorem for surjections implies AC. These are some of the oldest open problems in set theory. 50.221.225.231 (talk) 16:02, 26 November 2024 (UTC)