User contributions for Kai Neergård
A user with 334 edits. Account created on 7 June 2010.
21 July 2023
- 14:1614:16, 21 July 2023 diff hist +23 Change of rings →Relation between the extension of scalars and the restriction of scalars: adjustment of language: The Hom's are certainly not groups (no internal composition) and isomorphism seem undefined in this context.
19 November 2022
- 23:2823:28, 19 November 2022 diff hist +33 m Pin group →References: added author link
9 October 2022
- 22:3122:31, 9 October 2022 diff hist +1 m Pfaffian →Trace identities {{cite journal | first=M. A. | last=Krivrochenko | year=2016 | title=Trace Identities for Skew-Symmetric Matrices | pages=arXiv:1605.00447 | url=https://arxiv.org/abs/1605.00447 }}: corrected author name
- 21:5221:52, 9 October 2022 diff hist +115 m Pfaffian added reference and removed condition not mentioned there
4 October 2022
- 10:1410:14, 4 October 2022 diff hist +7 m Pfaffian math format
- 10:1110:11, 4 October 2022 diff hist −4 m Pfaffian italics inappropriate , definition was given already
18 September 2022
- 06:5506:55, 18 September 2022 diff hist +11 m Pfaffian Don't believe the differential equations in a Pfaffian system are ordinary. Added cross reference.
- 06:3106:31, 18 September 2022 diff hist −59 m Pfaffian Even better.
17 September 2022
- 23:2823:28, 17 September 2022 diff hist +2 m Pfaffian changed a single word
- 23:1123:11, 17 September 2022 diff hist +78 Pfaffian Reading again Cayley's paper, I found that this is the most precise way of presenting Jacobi's role.
- 09:3209:32, 17 September 2022 diff hist −6 Pfaffian I think "cite" is also better here than "build on". Caley in fact cites Jacobi, who seems to have obtained some factorisation, but his proof does not use this result.
- 08:2508:25, 17 September 2022 diff hist +288 Pfaffian The reference to a recent note by Ledermann is replaced by a sketch of Caley's original proof.
10 July 2022
- 22:2022:20, 10 July 2022 diff hist +318 The Devils of Loudun (opera) added information on the 2012 edition
- 21:4821:48, 10 July 2022
diff hist 0 m
Resultant
Undid reversion of my previous edit. To my knowledge, the Cartesian product of a pair of vector spaces viewed as a single vector space is, in linear algebra, called the direct sum of the two vector spaces and denoted the way I did.
UndoReverted
9 April 2022
- 11:4711:47, 9 April 2022 diff hist 0 m Resultant →Definition: entered the appropriate symbol for the direct sum Tag: Reverted
27 March 2022
- 12:2712:27, 27 March 2022 diff hist +40 m Jordan normal form →A proof: Undid my previous change of a reference and supplied authors' first names. The present reference relates more directly to the actual case of an algebraically closed field.
26 March 2022
- 14:3114:31, 26 March 2022 diff hist +7 m Jordan normal form →A proof: Supplied the first name of Nathan Jacobson
- 14:2614:26, 26 March 2022 diff hist 0 Jordan normal form →Generalized eigenvectors: Redid my renaming of the size of the Jordan block from r to b. It is not true that the r used later in the article denotes this quantity. It denotes the range of A, which is something different. My edit just aimed at avoiding the possible confusion from the use of the same symbol in two different meanings.
21 March 2022
- 23:5123:51, 21 March 2022 diff hist −31 m Jordan normal form →A proof: another reference
- 19:3319:33, 21 March 2022 diff hist −42 m Jordan normal form fixed headlines damaged in the preceding edit
- 19:2619:26, 21 March 2022 diff hist +485 Jordan normal form →Generalized eigenvectors: filled in gaps in the proof
3 January 2021
- 17:3717:37, 3 January 2021 diff hist +2 m Resolvent cubic →Fifth definition: correcting obvious error
16 January 2020
- 10:1510:15, 16 January 2020 diff hist +17 Qasem Soleimani →Iranian propaganda
- 09:5709:57, 16 January 2020 diff hist +574 Talk:Qasem Soleimani →Lack of neutrality: reply
15 January 2020
- 22:2022:20, 15 January 2020 diff hist +904 Talk:Qasem Soleimani →Lack of neutrality: reentered text
14 January 2020
- 19:0619:06, 14 January 2020 diff hist −2,881 User talk:Kai Neergård removed obsolete content Tag: Blanking
- 18:5318:53, 14 January 2020 diff hist −1 m Talk:Qasem Soleimani →Lack of neutrality: formal
13 January 2020
- 22:1522:15, 13 January 2020 diff hist +11 m Talk:Qasem Soleimani →Lack of neutrality: tiny improvement of wording
- 18:1318:13, 13 January 2020 diff hist +311 Talk:Qasem Soleimani Questioning objectivity and neutrality of first paragraph of section 6.2 Reaction
6 April 2017
- 19:2219:22, 6 April 2017 diff hist +4 m Nordic Mathematical Contest corrected previous ediy
- 19:1819:18, 6 April 2017 diff hist +16 m Nordic Mathematical Contest blind links deleted
16 June 2015
- 22:4022:40, 16 June 2015 diff hist +31 Angles between flats →References: category "Analytic geometry" added
14 June 2015
- 10:5210:52, 14 June 2015 diff hist −28 m Angles between flats "in the literature" not needed
- 08:0008:00, 14 June 2015 diff hist 0 m Singular value decomposition →{{anchor|vch}} Based on variational characterization: moved anchor
- 07:5807:58, 14 June 2015 diff hist −11 Angles between flats →Angles between subspaces: more elegant wording
13 June 2015
- 23:3723:37, 13 June 2015 diff hist −119 Angles between flats →Angles between subspaces: origin of coordinate system is irrelevant
- 23:1623:16, 13 June 2015 diff hist −20 Angles between flats →Angles between subspaces: more explicit connection to the preceding section
- 08:0308:03, 13 June 2015 diff hist 0 m Angles between flats →Jordan's definition: \mathbb
- 08:0008:00, 13 June 2015 diff hist +41 Angles between flats →Angles between subspaces: better wording, "zero vector", "orthogonal“ linked
- 07:3807:38, 13 June 2015 diff hist +9 Angles between flats →Angles between subspaces: more rigorous introduction
12 June 2015
- 23:2323:23, 12 June 2015 diff hist +23 m Angles between flats →Angles between subspaces: "transformations" outside link
- 23:1523:15, 12 June 2015 diff hist −5 m Angles between flats →Angles between subspaces: "Being the unit vectors of"->"Being related to the" because the vectors mentioned are not axis unit vectors all of them
- 22:4422:44, 12 June 2015 diff hist 0 Angles between flats →{{Anchor|vch}}Variational characterisation: {{Anchor|vch}}->{{anchor|vch}}
- 22:4122:41, 12 June 2015 diff hist −6 Angles between flats →{{Anchor|vch}}Variational characterisation: preciser link to article "Singular value decomposition“
- 21:5821:58, 12 June 2015 diff hist +15 Singular value decomposition →Based on variational characterization: anchor added for external reference
- 15:0115:01, 12 June 2015 diff hist +521 Angles between flats reference to complex generalisation, small correction to reference "bjoerck"
- 09:2709:27, 12 June 2015 diff hist +11 m Angles between flats →Angles between subspaces: "axes"->"coordinate axes"
- 09:1309:13, 12 June 2015 diff hist +13 m Angles between flats →Jordan's definition: added "non-negative"
- 09:0809:08, 12 June 2015 diff hist +10 m Angles between flats punctuation outside <math/>, "zero"->"0", "this"->"that", order of arguments to {{cite journal}}
11 June 2015
- 23:5823:58, 11 June 2015 diff hist +8 m Angles between flats →References: template replaced with markup
