Exact cover: Revision history

20 July 2024

• curprev 22:0822:08, 20 July 2024‎ 32.132.90.178 talk‎ 36,577 bytes −1‎ →‎N queens problem: Fix layout. undo

18 July 2024

• curprev 16:5816:58, 18 July 2024‎ Starlighsky talk contribs‎ m 36,578 bytes +14‎ Correct link undo Tag: Visual edit
• curprev 14:5514:55, 18 July 2024‎ Starlighsky talk contribs‎ m 36,564 bytes +8‎ Added links undo Tags: Visual edit Disambiguation links added Newcomer task Newcomer task: expand
• curprev 14:5414:54, 18 July 2024‎ Starlighsky talk contribs‎ 36,556 bytes +5‎ Added link undo Tags: Visual edit Newcomer task Newcomer task: expand
• curprev 14:5114:51, 18 July 2024‎ Starlighsky talk contribs‎ 36,551 bytes +444‎ →‎N queens problem: Re-created image from Eight queens puzzle. undo Tags: Visual edit Newcomer task Newcomer task: expand
• curprev 14:2114:21, 18 July 2024‎ Starlighsky talk contribs‎ m 36,107 bytes −4‎ →‎N queens problem undo Tags: Visual edit Newcomer task Newcomer task: expand
• curprev 14:1714:17, 18 July 2024‎ Starlighsky talk contribs‎ 36,111 bytes +182‎ →‎N queens problem: Added information and expanded article to level that appears what was requested in banner. Removed banner because problem appears to have been solved. undo Tags: Visual edit Newcomer task Newcomer task: expand

10 July 2024

• curprev 04:2804:28, 10 July 2024‎ 2406:7400:63:4f16:1c1f:a90c:8d2:de91 talk‎ 35,929 bytes −28‎ →‎N queens problem undo
• curprev 04:2704:27, 10 July 2024‎ 2406:7400:63:4f16:1c1f:a90c:8d2:de91 talk‎ 35,957 bytes −2‎ →‎N queens problem undo
• curprev 04:2604:26, 10 July 2024‎ 2406:7400:63:4f16:1c1f:a90c:8d2:de91 talk‎ 35,959 bytes +70‎ →‎N queens problem undo

9 May 2024

• curprev 15:3515:35, 9 May 2024‎ Kuulopuhe talk contribs‎ m 35,889 bytes −1‎ Remove initial space undo

6 May 2024

• curprev 06:3906:39, 6 May 2024‎ OAbot talk contribs‎ m 35,890 bytes +17‎ Open access bot: doi updated in citation with #oabot. undo

3 May 2024

• curprev 15:4015:40, 3 May 2024‎ Starlighsky talk contribs‎ 35,873 bytes +694‎ Added more descriptive information and citaton. undo Tags: Visual edit Newcomer task Newcomer task: expand

21 April 2024

• curprev 19:2319:23, 21 April 2024‎ 2601:447:c601:3690:2cf1:9b3a:4c7c:9ee4 talk‎ 35,179 bytes +21‎ No edit summary undo

22 March 2024

• curprev 23:1423:14, 22 March 2024‎ InternetArchiveBot talk contribs‎ 35,158 bytes +252‎ Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.9.5 undo

2 March 2024

• curprev 02:5402:54, 2 March 2024‎ Starlighsky talk contribs‎ 34,906 bytes +342‎ Added citation undo Tags: Visual edit Newcomer task Newcomer task: expand

14 December 2023

• curprev 15:3015:30, 14 December 2023‎ 2a02:c7c:3603:b300:859b:c508:fe62:75d4 talk‎ 34,564 bytes +202‎ Improve math typography in the first two sections undo

11 December 2023

• curprev 12:0412:04, 11 December 2023‎ 2a02:c7c:3603:b300:ac5b:f778:49e3:262d talk‎ 34,362 bytes +96‎ →‎Basic examples undo
• curprev 11:5211:52, 11 December 2023‎ 2a02:c7c:3603:b300:ac5b:f778:49e3:262d talk‎ 34,266 bytes +6‎ Make the math typography consistent in the "Basic examples" section undo

9 December 2023

• curprev 20:0320:03, 9 December 2023‎ Fschwarzentruber talk contribs‎ 34,260 bytes +72‎ →‎Detailed example: illustration undo Tag: Visual edit

12 November 2023

• curprev 06:2306:23, 12 November 2023‎ FrescoBot talk contribs‎ m 34,188 bytes −17‎ Bot: link syntax undo

1 November 2023

• curprev 02:5502:55, 1 November 2023‎ Rob Zako talk contribs‎ m 34,205 bytes −6‎ →‎Generalized exact cover: Replace "selection" with "choice" for consistency with rest of article undo
• curprev 02:5302:53, 1 November 2023‎ Rob Zako talk contribs‎ m 34,211 bytes −1‎ →‎Finding solutions: Replace duplicate "DLX" with "it" undo
• curprev 02:5202:52, 1 November 2023‎ Rob Zako talk contribs‎ m 34,212 bytes −67‎ →‎Finding solutions: Remove parenthetical comment about a torus, as this adds nothing to the topic undo
• curprev 02:4802:48, 1 November 2023‎ Rob Zako talk contribs‎ m 34,279 bytes −52‎ →‎Exact hitting set: Consistently use "is contained in" (∈) language for consistency undo
• curprev 02:3902:39, 1 November 2023‎ Rob Zako talk contribs‎ m 34,331 bytes +13‎ →‎Detailed example: Explicitly use "is covered by" language for the exact cover undo
• curprev 02:3202:32, 1 November 2023‎ Rob Zako talk contribs‎ m 34,318 bytes +6‎ →‎Detailed example: Replace "collection" with "subcollection" where appropriate undo

29 October 2023

• curprev 19:4819:48, 29 October 2023‎ Rob Zako talk contribs‎ 34,312 bytes −222‎ →‎Sudoku: Eliminate now obsolete reference to equivalent problems, as the reference to "Exact hitting set" suffices undo
• curprev 19:4019:40, 29 October 2023‎ Rob Zako talk contribs‎ m 34,534 bytes +8‎ →‎Representations undo
• curprev 19:3919:39, 29 October 2023‎ Rob Zako talk contribs‎ m 34,526 bytes +15‎ →‎Representations: Add missing words "of constraints" undo
• curprev 19:3819:38, 29 October 2023‎ Rob Zako talk contribs‎ m 34,511 bytes +8‎ No edit summary undo
• curprev 19:3619:36, 29 October 2023‎ Rob Zako talk contribs‎ 34,503 bytes −120‎ →‎Representations: Introduce choices and constraints earlier in the introduction undo
• curprev 19:3319:33, 29 October 2023‎ Rob Zako talk contribs‎ m 34,623 bytes +2‎ →‎Formal definition: Italicize rather than quote when explaining the meaning of "exact" undo
• curprev 19:3019:30, 29 October 2023‎ Rob Zako talk contribs‎ 34,621 bytes +245‎ Revise the introduction to more gracefully introduce representations undo
• curprev 19:0819:08, 29 October 2023‎ Rob Zako talk contribs‎ m 34,376 bytes +56‎ →‎Representations: In introduction, summarize (and slightly retitle) each kind of representation undo
• curprev 18:1818:18, 29 October 2023‎ Rob Zako talk contribs‎ 34,320 bytes −5,259‎ →‎Representations: Significantly revise this section to focus on the similarities between different representations, presenting the "Detailed example" with each representation undo
• curprev 05:5405:54, 29 October 2023‎ Rob Zako talk contribs‎ 39,579 bytes +2‎ →‎Exact hitting set: Demote section in preparation for merging into "Representations" section undo
• curprev 05:5205:52, 29 October 2023‎ Rob Zako talk contribs‎ 39,577 bytes −27‎ Reorder sections to introduce representations earlier in the article, in preparation for condensing down undo
• curprev 05:3705:37, 29 October 2023‎ Rob Zako talk contribs‎ 39,604 bytes +430‎ →‎Detailed example: Streamline section by highlighting the exact cover in bold red undo
• curprev 05:3305:33, 29 October 2023‎ Rob Zako talk contribs‎ 39,174 bytes −2‎ →‎Basic examples: Promote to primary section undo

28 October 2023

• curprev 21:0121:01, 28 October 2023‎ Rob Zako talk contribs‎ m 39,176 bytes 0‎ →‎See also: Reorder in alphabetical order undo
• curprev 20:1920:19, 28 October 2023‎ Rob Zako talk contribs‎ m 39,176 bytes +54‎ →‎Exact hitting set: n the matrix, italicize the row labels a, b, c, d, e, f undo
• curprev 20:1420:14, 28 October 2023‎ Rob Zako talk contribs‎ m 39,122 bytes +70‎ →‎Matrix and hypergraph representations: Make explicit that rows are choices and columns are constraints undo
• curprev 20:1020:10, 28 October 2023‎ Rob Zako talk contribs‎ m 39,052 bytes −12‎ →‎Converse representation: Prefer the phrase "subsets that contain each elemenet" undo
• curprev 20:0820:08, 28 October 2023‎ Rob Zako talk contribs‎ 39,064 bytes +54‎ →‎Detailed example: Make more explicit the argument that this example has a unique exact cover undo
• curprev 20:0020:00, 28 October 2023‎ Rob Zako talk contribs‎ m 39,010 bytes +4‎ →‎Basic examples: Format "disjoint" and "cover" requirements as italicized rather than quoted undo
• curprev 19:5719:57, 28 October 2023‎ Rob Zako talk contribs‎ m 39,006 bytes −9‎ No need to say "slightly" generalized twice undo
• curprev 19:2519:25, 28 October 2023‎ Rob Zako talk contribs‎ 39,015 bytes −123‎ →‎Matrix and hypergraph representations: Remove inaccurate reference to Knuth's "Dancing Links" paper: The examples are different! undo
• curprev 17:4917:49, 28 October 2023‎ Rob Zako talk contribs‎ 39,138 bytes −2,220‎ →‎Exact hitting set: Eliminate different exact hitting set example, focusing on the parallel to the detailed exact cover set example undo
• curprev 17:1117:11, 28 October 2023‎ Rob Zako talk contribs‎ m 41,358 bytes −3‎ →‎Exact hitting set: Not inverse (-1) but converse (T) or R undo