2 September 2025

• curprev 09:1309:13, 2 September 2025 Pinotation talk contribs 12,079 bytes +427 →Olympiad Problems

19 February 2025

• curprev 21:3921:39, 19 February 2025 Charking talk contribs 11,652 bytes −13 Formatting

19 June 2024

• curprev 18:1318:13, 19 June 2024 Italianzebra talk contribs 11,665 bytes +1 →Example 4

5 August 2023

• curprev 20:0320:03, 5 August 2023 Etmetalakret talk contribs 11,664 bytes +10 →Example 1: Rational Approximation Theorem

3 February 2023

• curprev 09:4909:49, 3 February 2023 Etmetalakret talk contribs m 11,654 bytes −273 Minor clarity adjustments

26 January 2023

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25 January 2023

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• curprev 12:1612:16, 25 January 2023 Etmetalakret talk contribs m 11,547 bytes +42 Minor clarity adjustments

24 January 2023

• curprev 13:0413:04, 24 January 2023 Mathboy100 talk contribs 11,505 bytes +486 No edit summary

23 January 2023

• curprev 21:3621:36, 23 January 2023 Etmetalakret talk contribs m 11,019 bytes +16 Minor clarity adjustments
• curprev 21:3321:33, 23 January 2023 Etmetalakret talk contribs 11,003 bytes +3,273 No edit summary

21 January 2023

• curprev 13:1213:12, 21 January 2023 Etmetalakret talk contribs 7,730 bytes +341 Added another example, deleted two "intermediate" examples that really belonged in the introductory section.

20 January 2023

• curprev 17:3117:31, 20 January 2023 Etmetalakret talk contribs m 7,389 bytes +61 No edit summary
• curprev 15:5215:52, 20 January 2023 Etmetalakret talk contribs m 7,328 bytes +133 Slight change in example 1 to aid a new reader
• curprev 13:2913:29, 20 January 2023 Etmetalakret talk contribs 7,195 bytes +1,289 Added a few introductory problems

25 October 2022

• curprev 21:3521:35, 25 October 2022 Etmetalakret talk contribs 5,906 bytes −5 No edit summary
• curprev 21:1821:18, 25 October 2022 Etmetalakret talk contribs m 5,911 bytes +6 Minor changes to the introduction and proof of this page.

31 August 2022

• curprev 10:4710:47, 31 August 2022 Etmetalakret talk contribs m 5,905 bytes +23 No edit summary
• curprev 10:4410:44, 31 August 2022 Etmetalakret talk contribs 5,882 bytes +1,299 No edit summary

23 November 2021

• curprev 16:4416:44, 23 November 2021 Ehuang0531 talk contribs 4,583 bytes 0 Undo revision 150861 by Happykeeper (talk) I am aware that I am probably disappointing many of you, but I believe this joke has had a good run, and it is time for it to go now. Tag: Undo

26 October 2021

• curprev 00:3500:35, 26 October 2021 Owen1204 talk contribs m 4,583 bytes +4 →Olympiad Problems

1 April 2021

• curprev 23:5423:54, 1 April 2021 Happykeeper talk contribs 4,579 bytes 0 No edit summary

23 December 2020

• curprev 14:5814:58, 23 December 2020 Aditya404 talk contribs 4,579 bytes +73 →Examples

16 March 2020

• curprev 16:3616:36, 16 March 2020 Equinox8 talk contribs 4,506 bytes +134 No edit summary

26 October 2017

• curprev 13:2113:21, 26 October 2017 Copeland talk contribs 4,372 bytes −32 No edit summary

5 April 2017

• curprev 04:1404:14, 5 April 2017 I am not the one who talk contribs m 4,404 bytes +32 changed necessary condition for extended pigeon hole principle

12 January 2013

• curprev 19:0219:02, 12 January 2013 Flamefoxx99 talk contribs 4,372 bytes −4 No edit summary

1 June 2011

• curprev 16:3416:34, 1 June 2011 Btilm305 talk contribs 4,376 bytes −18 fixed numbering
• curprev 16:0116:01, 1 June 2011 Ftong talk contribs 4,394 bytes +11 →Examples
• curprev 11:0711:07, 1 June 2011 Ftong talk contribs 4,383 bytes −11 →Intermediate Problems
• curprev 11:0611:06, 1 June 2011 Ftong talk contribs 4,394 bytes +11 →Intermediate Problems
• curprev 10:5310:53, 1 June 2011 Ftong talk contribs 4,383 bytes +1 →Intermediate Problems
• curprev 10:5310:53, 1 June 2011 Ftong talk contribs 4,382 bytes +3 →Introductory Problems
• curprev 10:5310:53, 1 June 2011 Ftong talk contribs 4,379 bytes +416 →Intermediate Problems
• curprev 10:5010:50, 1 June 2011 Ftong talk contribs 3,963 bytes −365 →Olympiad Problems
• curprev 10:3910:39, 1 June 2011 Ftong talk contribs 4,328 bytes −5 →Introductory Problems
• curprev 10:3910:39, 1 June 2011 Ftong talk contribs 4,333 bytes +5 →Introductory Problems
• curprev 10:3910:39, 1 June 2011 Ftong talk contribs 4,328 bytes −1 →Introductory Problems
• curprev 10:3810:38, 1 June 2011 Ftong talk contribs 4,329 bytes +236 →Introductory Problems
• curprev 10:2110:21, 1 June 2011 Ftong talk contribs 4,093 bytes +3 No edit summary
• curprev 10:1710:17, 1 June 2011 Ftong talk contribs 4,090 bytes +1 →Introductory Problems
• curprev 10:1710:17, 1 June 2011 Ftong talk contribs 4,089 bytes +48 →Introductory Problems
• curprev 10:1610:16, 1 June 2011 Ftong talk contribs 4,041 bytes +26 →Introductory Problems

6 December 2009

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5 December 2009

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7 September 2009

• curprev 16:5716:57, 7 September 2009 JBL talk contribs 4,024 bytes +205 No edit summary
• curprev 11:3111:31, 7 September 2009 Maybach talk contribs 3,819 bytes +145 →Introductory Problems

11 July 2008

• curprev 20:4420:44, 11 July 2008 Mrosett talk contribs 3,674 bytes −38 No edit summary
• curprev 18:0418:04, 11 July 2008 Facis talk contribs m 3,712 bytes 0 →Olympiad Problems

5 July 2008

• curprev 11:1111:11, 5 July 2008 Mrosett talk contribs 3,712 bytes +38 No edit summary