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So what is the Dehn invariant of a regular tetrahedron ? Can we show it as a vector or tensor ? - Rod57 ( talk) 10:40, 8 November 2017 (UTC)
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Anyone know if this recent proof is accepted? I don't have access to journals. https://link.springer.com/article/10.1134/S0081543818060068
If so we should update this page and the one on flexible polyhedra. — Preceding unsigned comment added by 67.188.115.54 ( talk) 07:59, 2 November 2019 (UTC)
I was asked to create this image as an illustration for this topic. Not sure if it would make sense in the article, so I propose it here. -- Watchduck ( quack) 10:34, 24 August 2021 (UTC)
The following discussion is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.
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Reviewing |
Reviewer: Kusma ( talk · contribs) 09:31, 8 March 2023 (UTC)
Will review this one. Expect comments over the next few days. — Kusma ( talk) 09:31, 8 March 2023 (UTC)
nontrivial methods in number theory"of"? "from"?
Like the cube, the Dehn invariant of any parallelepiped is also zero.The cube is not zero.
Overall quite a nice article about a famous concept and some deep connections. I think it has a good mix of understandable to the general public and requiring deeper expertise. I'll do image and source checking later, but other than the somewhat questionable 24 (Rich Schwartz, lecture notes?) I expect to have no major concerns. None of my comments above points to major issues with other criteria. — Kusma ( talk) 18:05, 9 March 2023 (UTC)
Good Article review progress box
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Thanks for the thorough review! I'll try to get to this over the weekend. — David Eppstein ( talk) 22:56, 9 March 2023 (UTC)
When Dehn invariant is calculated for the set of 5 Platonic solids, the dihedral angle of dodecahedron in this article is said to be 2atan(2) which is approximately 126.9 degrees. However, on the page "Regular Dodecahderon" the dihedral angle of the same solid is said to be acos(-1/sqrt(5)) which is roughly 116.6 degrees. Those values are incosistent, and it seems like the second is correct. Am I missing something? Serpens 2 ( talk) 05:34, 24 July 2023 (UTC)
![]() | Dehn invariant has been listed as one of the
Mathematics good articles under the
good article criteria. If you can improve it further,
please do so. If it no longer meets these criteria, you can
reassess it. Review: March 13, 2023. ( Reviewed version). |
![]() | A fact from Dehn invariant appeared on Wikipedia's
Main Page in the
Did you know column on 11 March 2017 (
check views). The text of the entry was as follows:
| ![]() |
![]() | This article is rated GA-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||
|
So what is the Dehn invariant of a regular tetrahedron ? Can we show it as a vector or tensor ? - Rod57 ( talk) 10:40, 8 November 2017 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Dehn invariant. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
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source check}}
(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 05:06, 10 December 2017 (UTC)
Anyone know if this recent proof is accepted? I don't have access to journals. https://link.springer.com/article/10.1134/S0081543818060068
If so we should update this page and the one on flexible polyhedra. — Preceding unsigned comment added by 67.188.115.54 ( talk) 07:59, 2 November 2019 (UTC)
I was asked to create this image as an illustration for this topic. Not sure if it would make sense in the article, so I propose it here. -- Watchduck ( quack) 10:34, 24 August 2021 (UTC)
The following discussion is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.
GA toolbox |
---|
Reviewing |
Reviewer: Kusma ( talk · contribs) 09:31, 8 March 2023 (UTC)
Will review this one. Expect comments over the next few days. — Kusma ( talk) 09:31, 8 March 2023 (UTC)
nontrivial methods in number theory"of"? "from"?
Like the cube, the Dehn invariant of any parallelepiped is also zero.The cube is not zero.
Overall quite a nice article about a famous concept and some deep connections. I think it has a good mix of understandable to the general public and requiring deeper expertise. I'll do image and source checking later, but other than the somewhat questionable 24 (Rich Schwartz, lecture notes?) I expect to have no major concerns. None of my comments above points to major issues with other criteria. — Kusma ( talk) 18:05, 9 March 2023 (UTC)
Good Article review progress box
|
Thanks for the thorough review! I'll try to get to this over the weekend. — David Eppstein ( talk) 22:56, 9 March 2023 (UTC)
When Dehn invariant is calculated for the set of 5 Platonic solids, the dihedral angle of dodecahedron in this article is said to be 2atan(2) which is approximately 126.9 degrees. However, on the page "Regular Dodecahderon" the dihedral angle of the same solid is said to be acos(-1/sqrt(5)) which is roughly 116.6 degrees. Those values are incosistent, and it seems like the second is correct. Am I missing something? Serpens 2 ( talk) 05:34, 24 July 2023 (UTC)