Euler's four-square identity: Revision history

18 March 2024

• curprev 14:1314:13, 18 March 2024‎ InternetArchiveBot talk contribs‎ 8,584 bytes +122‎ Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.9.5 undo

2 February 2024

• curprev 13:5913:59, 2 February 2024‎ Tarnoob talk contribs‎ 8,462 bytes −35‎ →‎External links: cat. undo

6 January 2023

• curprev 21:1621:16, 6 January 2023‎ Jacobolus talk contribs‎ m 8,497 bytes +11‎ →‎Pfister's identity undo
• curprev 21:1521:15, 6 January 2023‎ Jacobolus talk contribs‎ 8,486 bytes −11‎ →‎Pfister's identity: consolidate right-hand side from 4 lines to 2 undo
• curprev 21:1121:11, 6 January 2023‎ Jacobolus talk contribs‎ 8,497 bytes −35‎ →‎Algebraic identity: on second thought maybe this top equation works better with the left hand side on its own line undo
• curprev 21:0821:08, 6 January 2023‎ Jacobolus talk contribs‎ m 8,532 bytes +4‎ →‎Proof of the identity using quaternions: <math display=block> needs to be offset by blank lines or it generates incorrect markup (bare text nodes not wrapped in any top-level block element) undo
• curprev 21:0421:04, 6 January 2023‎ Jacobolus talk contribs‎ 8,528 bytes +185‎ →‎Proof of the identity using quaternions: split long lines in half for legibility / so they fit better on smaller displays undo
• curprev 20:5420:54, 6 January 2023‎ Jacobolus talk contribs‎ 8,343 bytes +56‎ →‎Algebraic identity: write each side of the equation as two lines instead of writing the left side as one line and the right side as four lines. (feel free to revert if this seems worse) undo

5 August 2022

• curprev 05:0705:07, 5 August 2022‎ Hellacioussatyr talk contribs‎ 8,287 bytes +394‎ No edit summary undo Tag: 2017 wikitext editor

16 February 2022

• curprev 06:5606:56, 16 February 2022‎ 2a02:120b:2c11:6520:7dc2:6b9f:be9d:95e0 talk‎ 7,893 bytes +550‎ →‎Proof of the identity using quaternions undo

4 July 2021

• curprev 08:1208:12, 4 July 2021‎ D.Lazard talk contribs‎ 7,343 bytes +10‎ →‎top: fixing incorrect short desc undo
• curprev 03:2403:24, 4 July 2021‎ Bri talk contribs‎ m 7,333 bytes −2‎ Remove "A" as the first word from short descriptions (via WP:JWB) undo

28 March 2021

• curprev 02:2202:22, 28 March 2021‎ Hector Trojan talk contribs‎ 7,335 bytes +19‎ added template undo

12 April 2020

• curprev 20:5420:54, 12 April 2020‎ Joel Brennan talk contribs‎ m 7,316 bytes −11‎ →‎Proof of the identity using quaternions: formatting undo

11 April 2020

• curprev 09:2209:22, 11 April 2020‎ D.Lazard talk contribs‎ 7,327 bytes +1‎ Changing short description from "A product of sums of two squares is a sum of four squares" to "A product of sums of four squares is a sum of four squares" (Shortdesc helper) undo
• curprev 09:2109:21, 11 April 2020‎ D.Lazard talk contribs‎ 7,326 bytes +80‎ Adding local short description: "A product of sums of two squares is a sum of four squares", overriding Wikidata description "theorem" (Shortdesc helper) undo

9 February 2020

• curprev 03:4403:44, 9 February 2020‎ Yahya Abdal-Aziz talk contribs‎ 7,246 bytes +73‎ →‎Proof of the identity using quaternions: - copy-edit; wikilink Hamilton product undo
• curprev 03:3403:34, 9 February 2020‎ Yahya Abdal-Aziz talk contribs‎ 7,173 bytes +82‎ →‎Pfister's identity: - copy-edit undo

16 October 2019

• curprev 07:3707:37, 16 October 2019‎ Alexey Muranov talk contribs‎ m 7,091 bytes +2‎ →‎Algebraic identity: "proven" is to strong of a word for this elementary verification, change to "verified" undo

9 September 2019

• curprev 16:5216:52, 9 September 2019‎ 204.34.211.70 talk‎ 7,089 bytes −5‎ →‎Pfister's identity: -Note undo

23 March 2019

• curprev 09:5009:50, 23 March 2019‎ AugPi talk contribs‎ 7,094 bytes +3,043‎ a proof undo

10 March 2019

• curprev 11:3911:39, 10 March 2019‎ Triptothecottage talk contribs‎ 4,051 bytes +28‎ added Category:Leonhard Euler using HotCat undo

15 November 2018

• curprev 13:2813:28, 15 November 2018‎ The Anome talk contribs‎ m 4,023 bytes −19‎ Reverted edits by The Anomebot2 (talk) to last version by Seahawk01 undo Tag: Rollback
• curprev 13:2813:28, 15 November 2018‎ The Anomebot2 talk contribs‎ 4,042 bytes +19‎ Adding geodata: {{coord missing}} undo

13 October 2018

• curprev 03:2103:21, 13 October 2018‎ Seahawk01 talk contribs‎ m 4,023 bytes +38‎ added category undo

22 September 2017

• curprev 22:0422:04, 22 September 2017‎ 148.247.22.254 talk‎ 3,985 bytes 0‎ No edit summary undo

15 July 2017

• curprev 14:5614:56, 15 July 2017‎ Deacon Vorbis talk contribs‎ m 3,985 bytes −22‎ LaTeX spacing clean up, replaced: \,</math> → </math> (11) using AWB undo

18 September 2016

• curprev 19:1819:18, 18 September 2016‎ Alexis Humphreys talk contribs‎ m 4,007 bytes +1‎ No edit summary undo
• curprev 19:1719:17, 18 September 2016‎ Alexis Humphreys talk contribs‎ m 4,006 bytes −70‎ No edit summary undo

22 May 2016

• curprev 01:5701:57, 22 May 2016‎ Rgdboer talk contribs‎ 4,076 bytes +158‎ lk Composition algebra, copy edit undo

29 July 2014

• curprev 18:5118:51, 29 July 2014‎ A876 talk contribs‎ 3,918 bytes +53‎ see-also: added Brahmagupta–Fibonacci identity undo

29 June 2014

• curprev 00:0600:06, 29 June 2014‎ Arthur Rubin talk contribs‎ 3,865 bytes 0‎ →‎top: change signs undo

10 February 2014

• curprev 18:1618:16, 10 February 2014‎ Lilith112358 talk contribs‎ m 3,865 bytes +1‎ Minor fixing in markup undo

13 August 2013

• curprev 23:0923:09, 13 August 2013‎ Titus III talk contribs‎ 3,864 bytes +13‎ Re-directed "bilinear" wiki-link to the more appropriate "bilinear map". undo

12 August 2013

• curprev 00:3400:34, 12 August 2013‎ Titus III talk contribs‎ 3,851 bytes +40‎ →‎See also: Added wiki-link to Pfister's 16-square identity undo

11 August 2013

• curprev 21:0221:02, 11 August 2013‎ Titus III talk contribs‎ 3,811 bytes +41‎ Added more details. undo

26 February 2013

• curprev 01:0801:08, 26 February 2013‎ Addbot talk contribs‎ m 3,770 bytes −632‎ Bot: Migrating 12 interwiki links, now provided by Wikidata on d:q1149225 (Report Errors) undo

7 August 2012

• curprev 23:2523:25, 7 August 2012‎ Michael Hardy talk contribs‎ 4,402 bytes +4‎ punctuation correction required by WP:MOS undo

1 June 2012

• curprev 05:0505:05, 1 June 2012‎ Macrakis talk contribs‎ 4,398 bytes −13‎ improve grammar undo

21 April 2012

• curprev 20:5720:57, 21 April 2012‎ RedBot talk contribs‎ m 4,411 bytes +65‎ r2.7.2) (Robot: Adding ar:متطابقة المربعات الأربع لأويلر undo

2 April 2012

• curprev 09:3609:36, 2 April 2012‎ 129.16.126.117 talk‎ 4,346 bytes −834‎ I deleted an unpublished generalization. No indication that it is new or notable. undo

6 February 2012

• curprev 13:4313:43, 6 February 2012‎ ZéroBot talk contribs‎ m 5,180 bytes +47‎ r2.7.1) (Robot: Adding pl:Tożsamość czterech kwadratów Eulera undo

14 November 2011

• curprev 19:1519:15, 14 November 2011‎ HenryWJ talk contribs‎ 5,133 bytes +835‎ No edit summary undo

6 September 2011

• curprev 07:4207:42, 6 September 2011‎ Luckas-bot talk contribs‎ m 4,298 bytes +46‎ r2.7.1) (robot Adding: ca:Identitat dels quatre quadrats d'Euler undo

21 April 2011

• curprev 04:0904:09, 21 April 2011‎ RobHar talk contribs‎ m 4,252 bytes +2‎ switch cat analytic number theory -> elementary number theory undo

16 April 2011

• curprev 03:0103:01, 16 April 2011‎ WikitanvirBot talk contribs‎ m 4,250 bytes +44‎ r2.7.1) (robot Adding: ko:오일러의 네 제곱수 항등식 undo

3 April 2011

• curprev 07:4507:45, 3 April 2011‎ Yobot talk contribs‎ m 4,206 bytes +43‎ WP:CHECKWIKI error 61 fixes + general fixes, References after punctuation per WP:REFPUNC and WP:PAIC using AWB (7671) undo

5 January 2011

• curprev 15:0215:02, 5 January 2011‎ Titus III talk contribs‎ 4,163 bytes +814‎ Added different kind of four-square identity undo

24 July 2010

• curprev 22:3722:37, 24 July 2010‎ Trovatore talk contribs‎ 3,349 bytes +60‎ clarify undo

29 June 2010

• curprev 00:3100:31, 29 June 2010‎ KamikazeBot talk contribs‎ m 3,289 bytes +50‎ robot Adding: es:Identidad de los cuatro cuadrados de Euler undo