User contributions for Jfdavis

A user with 24 edits. Account created on 7 November 2009.
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23 February 2024

13 February 2024

7 July 2020

10 June 2020

21 August 2019

8 August 2019

  • 14:4914:49, 8 August 2019 diff hist +16 m CobordismReplaced \subset with \hookrightarrow. (Typically \subset is reserved for inclusion and \hookrightarrow is used for an embedding - a map which is a homeomorphism onto its image.) Tag: Visual edit

24 July 2019

23 July 2019

  • 01:1401:14, 23 July 2019 diff hist −19 m Borromean ringsThe removed statement "In other words, no two of the three rings are linked with each other as a Hopf link" was not accurate; this did not restate the first sentence, since there are many two component links other than the unlink and the Hopf link. Tag: Visual edit

22 July 2019

  • 16:4616:46, 22 July 2019 diff hist −47 m UnipotentThe previous statement: "Equivalently, M is unipotent if all its eigenvalues are 1." was not true unless the characteristic polynomial factors as a product of linear factors. I replaced the statement with a true statement. Tag: Visual edit

26 September 2012

9 May 2012

28 March 2012

27 March 2012

26 February 2012

6 February 2011

11 November 2009

7 November 2009