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Second partial derivative test: Revision history

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curprev 08:3708:37, 5 June 2025 TakuyaMurata talk contribs 7,795 bytes +39 see also: * Second variation undo

curprev 00:5200:52, 26 December 2024 JayBeeEll talk contribs m 7,756 bytes −1 rv undo

curprev 20:0620:06, 22 December 2024 14.139.222.79 talk 7,757 bytes +6 →Functions of many variables= undo
curprev 20:0520:05, 22 December 2024 14.139.222.79 talk 7,751 bytes +1 →Functions of many variables undo

curprev 01:4301:43, 6 May 2024 David Eppstein talk contribs 7,750 bytes +5 →References: split author undo
curprev 01:4301:43, 6 May 2024 David Eppstein talk contribs 7,745 bytes 0 adjust ref year undo Tag: harv or sfn error

curprev 15:2515:25, 10 April 2023 Fgnievinski talk contribs 7,745 bytes −18 No edit summary undo Tag: 2017 wikitext editor

curprev 03:5403:54, 18 March 2023 73.140.250.247 talk 7,763 bytes −1 →Functions of two variables undo Tag: Visual edit

curprev 22:0222:02, 16 December 2022 JayBeeEll talk contribs 7,764 bytes +9 →Functions of two variables: minor tweaks undo

curprev 17:5517:55, 14 December 2022 Bridgeram talk contribs m 7,755 bytes +188 added mention of an implicit condition that fxx=0 or fyy=0 implies cases 3 or 4. an obvious consequence but maybe helpful to state explicitly undo Tag: Visual edit

curprev 23:4523:45, 6 December 2022 RadioactiveBoulevardier talk contribs 7,567 bytes +55 Adding local short description: "Method in multivariable calculus", overriding Wikidata description "mathematical term" undo Tag: Shortdesc helper

curprev 14:0514:05, 20 November 2022 Roundish talk contribs 7,512 bytes +491 Reverting edit(s) by 211.22.180.226 (talk) to rev. 1075092983 by Yodo9000: test edits (RW 16.1) undo Tags: RW Undo
curprev 14:0514:05, 20 November 2022 211.22.180.226 talk 7,021 bytes −491 →Functions of many variables undo Tag: Reverted

curprev 21:5221:52, 3 March 2022 Yodo9000 talk contribs m 7,512 bytes 0 →The test: second degree polynomial -> second-degree polynomial undo

curprev 04:2004:20, 12 October 2021 Hellacioussatyr talk contribs 7,512 bytes +32 →Functions of two variables undo Tags: Mobile edit Mobile web edit Advanced mobile edit

curprev 20:1720:17, 11 February 2021 97.113.155.250 talk 7,480 bytes −2 No edit summary undo Tag: Manual revert
curprev 20:1620:16, 11 February 2021 97.113.155.250 talk 7,482 bytes +2 No edit summary undo Tag: Reverted

curprev 18:5018:50, 17 December 2020 Tom.Reding talk contribs m 7,480 bytes +5 Enum 1 author/editor WL; WP:GenFixes on undo Tag: AWB

curprev 13:1613:16, 26 October 2020 JayBeeEll talk contribs 7,475 bytes −475 Undid revision 985440682 by Bass77 (talk) this is already explained below, and cannot be understood at this stage because the test for more variables has not been introduced yet undo

curprev 23:5423:54, 25 October 2020 Bass77 talk contribs 7,950 bytes +476 →Functions of two variables: Relation between D(x, y) and the definite/indefinite nature of the Hessian undo Tag: Visual edit

curprev 09:5709:57, 30 September 2020 Hellacioussatyr talk contribs 7,474 bytes 0 →Functions of two variables undo Tag: 2017 wikitext editor
curprev 09:5309:53, 30 September 2020 Hellacioussatyr talk contribs 7,474 bytes +283 →Functions of two variables undo Tag: 2017 wikitext editor

curprev 13:1113:11, 4 August 2020 Krb19 talk contribs 7,191 bytes +121 →The test: explained why other formulations of the test are equivalent undo Tag: Visual edit

curprev 05:5305:53, 29 May 2020 Jasper Deng talk contribs 7,070 bytes +4 →Functions of many variables: the determinant works in 2D, need 3D for counterexamples undo Tags: Mobile edit Mobile web edit Advanced mobile edit

curprev 00:1100:11, 28 May 2020 BChoi33 talk contribs 7,066 bytes +20 →Functions of two variables undo

curprev 19:5419:54, 27 May 2020 BChoi33 talk contribs 7,046 bytes +23 →The test: Continuity of the second partial derivatives are needed to guarantee equality of the mixed partial derivatives undo

curprev 18:5818:58, 10 April 2020 JayBeeEll talk contribs 7,023 bytes −847 Reverted 2 edits by 129.67.118.9 (talk): This is not decipherable in context, and uncited, and misplaced (TW) undo Tag: Undo
curprev 17:2317:23, 10 April 2020 129.67.118.9 talk 7,870 bytes +4 →Functions of two variables undo
curprev 17:2317:23, 10 April 2020 129.67.118.9 talk 7,866 bytes +843 →Functions of two variables undo

curprev 19:3619:36, 14 January 2020 JayBeeEll talk contribs 7,023 bytes +88 Undid revision 935791577 by 190.156.40.70 (talk) rv unexplained deletion undo Tag: Undo
curprev 19:3119:31, 14 January 2020 190.156.40.70 talk 6,935 bytes −88 →Functions of many variables undo

curprev 17:1917:19, 5 November 2018 83.44.72.190 talk 7,023 bytes +1 Typo undo
curprev 17:1917:19, 5 November 2018 83.44.72.190 talk 7,022 bytes 0 Typo undo

curprev 09:0809:08, 27 March 2018 130.92.120.55 talk 7,022 bytes −98 →Functions of many variables undo

curprev 01:1501:15, 26 July 2017 Loraof talk contribs 7,120 bytes −110 →Functions of many variables: no reason to exclude the two-variable case until near end of section undo

curprev 01:1001:10, 20 June 2017 CBM talk contribs m 7,230 bytes +4 Manually reviewed edit to replace magic words per local rfc undo

curprev 22:4222:42, 18 April 2017 JayBeeEll talk contribs m 7,226 bytes −14 Undid revision 776078323 by 72.0.129.26 (talk) undo
curprev 21:0621:06, 18 April 2017 72.0.129.26 talk 7,240 bytes +14 →Examples undo

curprev 00:1600:16, 5 January 2017 JayBeeEll talk contribs 7,226 bytes −41 That doesn't make sense. undo
curprev 00:1300:13, 5 January 2017 98.213.51.34 talk 7,267 bytes 0 →Functions of two variables undo
curprev 00:1100:11, 5 January 2017 98.213.51.34 talk 7,267 bytes +41 →Functions of two variables undo

curprev 08:4308:43, 25 September 2016 Bender the Bot talk contribs m 7,226 bytes +2 →Functions of two variables: http→https for Google Books and Google News using AWB undo

curprev 11:5911:59, 25 June 2016 Snehalshekatkar talk contribs 7,224 bytes +29 →Functions of many variables undo

curprev 14:5514:55, 23 November 2015 Izno talk contribs 7,195 bytes +4 →Functions of many variables: add actual link undo
curprev 14:4714:47, 23 November 2015 201.75.171.119 talk 7,191 bytes +24 →Functions of many variables: Link to other wikipedia page undo Tags: Mobile edit Mobile web edit

curprev 22:5422:54, 18 October 2015 JayBeeEll talk contribs 7,167 bytes −2,235 →Geometric interpretation in the two-variable case: removed unsourced (and unsourcable?) section undo

curprev 20:1020:10, 11 June 2015 JayBeeEll talk contribs m 9,402 bytes −267 Wp articles are not help pages undo
curprev 19:5619:56, 11 June 2015 130.223.28.130 talk 9,669 bytes +20 →Functions of many variables undo
curprev 19:5519:55, 11 June 2015 130.223.28.130 talk 9,649 bytes +247 →The test undo

curprev 03:2203:22, 23 April 2015 Blacklemon67 talk contribs m 9,402 bytes 0 →The test: moved image to top of section undo

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