Spin group: Revision history

17 December 2023

• curprev 22:0222:02, 17 December 2023‎ Yinweichen talk contribs‎ m 27,861 bytes 0‎ No edit summary undo Tag: 2017 wikitext editor

8 December 2023

• curprev 06:0606:06, 8 December 2023‎ Fgnievinski talk contribs‎ 27,861 bytes +10‎ →‎top undo

8 October 2023

• curprev 06:3206:32, 8 October 2023‎ Anon126 talk contribs‎ 27,851 bytes −326‎ →‎Motivation and physical interpretation: remove subjective phrasing undo
• curprev 06:2106:21, 8 October 2023‎ 69.146.249.79 talk‎ 28,177 bytes +19‎ →‎Motivation and physical interpretation undo

24 February 2023

• curprev 19:1919:19, 24 February 2023‎ Zephyr the west wind talk contribs‎ m 28,158 bytes −2‎ →‎Fundamental groups of SO(n): formatting undo
• curprev 19:1819:18, 24 February 2023‎ Zephyr the west wind talk contribs‎ 28,160 bytes +558‎ →‎Fundamental groups of SO(n) undo
• curprev 10:5210:52, 24 February 2023‎ Zephyr the west wind talk contribs‎ 27,602 bytes +2,484‎ →‎Topological considerations undo
• curprev 10:2110:21, 24 February 2023‎ Zephyr the west wind talk contribs‎ 25,118 bytes −4‎ →‎Topological considerations: corrected error: Spin(n) simply connected, so fund gp would be trivial for second row! Preceding discussion tells us about fund gp of SO(n) undo

23 February 2023

• curprev 22:4322:43, 23 February 2023‎ Zephyr the west wind talk contribs‎ 25,122 bytes +1,538‎ →‎Construction: geometric undo
• curprev 22:1622:16, 23 February 2023‎ Zephyr the west wind talk contribs‎ 23,584 bytes 0‎ →‎Construction: the subalgebra isomorphic to spin(n) = so(n) is the quadratic part undo
• curprev 22:1222:12, 23 February 2023‎ Zephyr the west wind talk contribs‎ m 23,584 bytes +39‎ →‎Motivation and physical interpretation: link undo
• curprev 15:5715:57, 23 February 2023‎ Zephyr the west wind talk contribs‎ m 23,545 bytes 0‎ →‎Topological considerations: consistent font undo
• curprev 15:1315:13, 23 February 2023‎ Zephyr the west wind talk contribs‎ 23,545 bytes −11‎ →‎Topological considerations: correction: fundamental gp is zero for contractible cases undo
• curprev 15:0815:08, 23 February 2023‎ Zephyr the west wind talk contribs‎ 23,556 bytes 0‎ →‎Topological considerations: correction undo
• curprev 15:0715:07, 23 February 2023‎ Zephyr the west wind talk contribs‎ 23,556 bytes +191‎ needs multiplication law to give group structure description undo

16 February 2023

• curprev 22:1422:14, 16 February 2023‎ DanDangerous talk contribs‎ m 23,365 bytes +55‎ →‎Exceptional isomorphisms: added Cartan's classification for Spin(2)/SO(2) and Sp(1) for completeness undo

1 December 2022

• curprev 15:5815:58, 1 December 2022‎ Red Act talk contribs‎ 23,310 bytes −2‎ A Kernel (linear algebra) link here doesn't work well for a group whose operation is denoted multiplicatively. undo

26 July 2022

• curprev 10:5210:52, 26 July 2022‎ OpenScience709 talk contribs‎ m 23,312 bytes −28‎ Better description; spin groups are not exclusively a physics object. undo

22 July 2022

• curprev 16:2916:29, 22 July 2022‎ 76.22.27.77 talk‎ 23,340 bytes +28‎ in the opening section, linked the reference to the kernel to its page undo Tag: Visual edit

6 July 2022

• curprev 21:1721:17, 6 July 2022‎ Vaughan Pratt talk contribs‎ m 23,312 bytes +1‎ fall → falls (singular) undo

26 June 2022

• curprev 15:4915:49, 26 June 2022‎ Eulerfx talk contribs‎ m 23,311 bytes 0‎ →‎Construction: Corrected definition of n-dim. clifford algebra as n-spin algebra. undo Tag: 2017 wikitext editor

8 May 2022

• curprev 20:4320:43, 8 May 2022‎ 68.61.10.124 talk‎ 23,311 bytes +98‎ →‎Construction: Added that the Clifford algebra is finite dimensional undo Tag: Visual edit

2 February 2022

• curprev 21:0921:09, 2 February 2022‎ BattyBot talk contribs‎ 23,213 bytes −1‎ Moved References above External links per MOS:ORDER and other General fixes undo Tag: AWB

14 November 2021

• curprev 00:2400:24, 14 November 2021‎ Exceptg talk contribs‎ 23,214 bytes +143‎ added links to OEIS undo

19 January 2021

• curprev 04:1504:15, 19 January 2021‎ Yongyi781 talk contribs‎ 23,071 bytes −1‎ →‎Construction: Pretty sure the relation should be v*v - q(v) undo Tag: Visual edit

18 January 2021

• curprev 17:1317:13, 18 January 2021‎ Yongyi781 talk contribs‎ 23,072 bytes +369‎ →‎Double covering: Fixed surjectivity by introducing \alpha (the previous map wasn't surjective in odd dimensions) undo Tag: Visual edit
• curprev 16:4016:40, 18 January 2021‎ Yongyi781 talk contribs‎ 22,703 bytes +15‎ →‎Double covering: Fixed the definition of Spin(V) and fixed an incorrect statement at the end undo Tag: Visual edit
• curprev 05:2005:20, 18 January 2021‎ 61.69.160.28 talk‎ 22,688 bytes +30‎ →‎Double covering: Clarified definition of t undo Tags: Mobile edit Mobile web edit

17 January 2021

• curprev 23:3823:38, 17 January 2021‎ 202.125.25.23 talk‎ 22,658 bytes +20‎ →‎Construction undo

15 January 2021

• curprev 22:4122:41, 15 January 2021‎ John Baez talk contribs‎ 22,638 bytes +2‎ →‎Accidental isomorphisms: changed title to "exceptional isomorphisms" to match the title of that page on Wikipedia. (One can argue that there are no accidents in math.) undo

11 December 2020

• curprev 18:0918:09, 11 December 2020‎ Monkbot talk contribs‎ m 22,636 bytes −7‎ Task 18 (cosmetic): eval 4 templates: del empty params (1×); undo Tag: AWB

5 December 2020

• curprev 16:4716:47, 5 December 2020‎ Wundzer talk contribs‎ m 22,643 bytes +70‎ →‎See also undo Tag: Visual edit

2 December 2020

• curprev 11:5311:53, 2 December 2020‎ 81.97.26.63 talk‎ 22,573 bytes −7‎ →‎Spinor space undo

25 November 2020

• curprev 12:0012:00, 25 November 2020‎ 81.97.26.63 talk‎ 22,580 bytes −2‎ →‎Spinor space undo
• curprev 11:5811:58, 25 November 2020‎ 81.97.26.63 talk‎ 22,582 bytes +10‎ →‎Spinor space undo

15 September 2020

• curprev 14:5614:56, 15 September 2020‎ 7science talk contribs‎ 22,572 bytes +92‎ →‎Accidental isomorphisms: insert Cl^even(6) undo
• curprev 12:3012:30, 15 September 2020‎ 7science talk contribs‎ m 22,480 bytes +30‎ →‎Accidental isomorphisms: append "even" undo

2 June 2020

• curprev 10:4210:42, 2 June 2020‎ MrZyen talk contribs‎ 22,450 bytes +45‎ I'm pretty sure that in the three first cases, it should be Cl^{even} instead of Cl. I'm not entirely sure about the other cases so I left them as it is. undo

11 April 2020

• curprev 04:2804:28, 11 April 2020‎ 173.228.85.198 talk‎ 22,405 bytes +34‎ There was an offset in Cl(n) undo

7 March 2020

• curprev 13:1513:15, 7 March 2020‎ Citation bot talk contribs‎ m 22,371 bytes −97‎ Removed URL that duplicated unique identifier. Removed parameters. | You can use this bot yourself. Report bugs here. | Activated by User:AManWithNoPlan | All pages linked from User:AManWithNoPlan/sandbox2. undo

14 February 2020

• curprev 21:3921:39, 14 February 2020‎ Wundzer talk contribs‎ 22,468 bytes 0‎ →‎Postnikov tower: This is the whitehead tower, not postnikov undo Tag: 2017 wikitext editor

17 November 2019

• curprev 00:5100:51, 17 November 2019‎ Quondum talk contribs‎ 22,468 bytes −41‎ Undid my last edit – this was already linked undo Tag: Undo
• curprev 00:5000:50, 17 November 2019‎ Quondum talk contribs‎ 22,509 bytes +41‎ →‎Indefinite signature: {{see also|Indefinite orthogonal group}} undo
• curprev 00:4700:47, 17 November 2019‎ Quondum talk contribs‎ 22,468 bytes +31‎ →‎Construction: more accurate undo
• curprev 00:4400:44, 17 November 2019‎ Quondum talk contribs‎ 22,437 bytes +1‎ →‎Construction: the norm is awkward in the context of Clifford algebras (where its "square" - the quadratic form - can be negative, and is unavoidably so in the indefinite case discussed below undo
• curprev 00:3800:38, 17 November 2019‎ Quondum talk contribs‎ 22,436 bytes +231‎ ce undo

9 May 2019

• curprev 06:2006:20, 9 May 2019‎ 67.198.37.16 talk‎ 22,205 bytes −212‎ →‎Construction: remove non-sequiter sentence, now that otimes is gone undo

8 May 2019

• curprev 14:2314:23, 8 May 2019‎ D.Lazard talk contribs‎ 22,417 bytes +29‎ →‎Construction: dab quotient algebra undo

4 May 2019

• curprev 16:4116:41, 4 May 2019‎ 67.198.37.16 talk‎ 22,388 bytes +4‎ →‎Construction: wikilink quotient algebra undo
• curprev 16:3916:39, 4 May 2019‎ 67.198.37.16 talk‎ 22,384 bytes −84‎ →‎Double covering: Remove tensor symbol undo