User talk:Fropuff

File source problem with File:Coequalizer-01.png
Thank you for uploading File:Coequalizer-01.png. I noticed that the file's description page currently doesn't specify who created the content, so the copyright status is unclear. If you did not create this file yourself, you will need to specify the owner of the copyright. If you obtained it from a website, please add a link to the page from which it was taken, together with a brief restatement of the website's terms of use of its content. If the original copyright holder is a party unaffiliated with the website, that author should also be credited. Please add this information by editing the image description page.

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Klein bottle images.

 * ''A parameterization for an embedding of the Klein bottle into R4 = C2 is given by
 * $$z_1 = (a + b\cos v)e^{i u}\,$$
 * $$z_2 = (b\sin v)e^{i u/2}\,$$
 * where a &gt; b &gt; 0 are constants and u,v run from 0 to 2&pi;. Obviously I can't draw this one.

''

Perhaps a projection maybe?

The R4 parameterization above is basically just the basic torus parameterization as shown here with z1 = x + iy, and a real z height replaced by a complex or two dimensional z2 = z + iw. The minor cross section is a circle of radius b that "flips over" in the z-w space and presents its "backside" as it comes back around and re-connects. In the orthogonal R3 x-y-z projection the torus pinches or flattens to a line/crosscap at u = $\pi$. A possible figure could show the flattening torus with periodic circular cross sections that become horizontal at the cross over, and is then upside down after the cross over. In order to portray the "upside downess" perhaps the circle could have different colors for the top and bottom. Cloudswrest (talk) 17:55, 26 June 2014 (UTC)

File:Dynkin diagram E8.png listed for deletion
A file that you uploaded or altered, File:Dynkin diagram E8.png, has been listed at Files for deletion. Please see the to see why it has been listed (you may have to search for the title of the image to find its entry). Feel free to add your opinion on the matter below the nomination. Thank you. Stefan2 (talk) 22:28, 29 December 2014 (UTC)

Desuspension
Hi,

I have just noticed that you contributed a lot to write about suspension (topology). I have tried to write about desuspension, an opposite operation. May you review my work? I am not a professional mathematician, but high-profile math has been my passion since my childhood. Cheers! Lamro (talk) 14:26, 23 June 2015 (UTC)

ArbCom elections are now open!
Hi, You appear to be eligible to vote in the current Arbitration Committee election. The Arbitration Committee is the panel of editors responsible for conducting the Wikipedia arbitration process. It has the authority to enact binding solutions for disputes between editors, primarily related to serious behavioural issues that the community has been unable to resolve. This includes the ability to impose site bans, topic bans, editing restrictions, and other measures needed to maintain our editing environment. The arbitration policy describes the Committee's roles and responsibilities in greater detail. If you wish to participate, you are welcome to review the candidates' statements and submit your choices on the voting page. For the Election committee, MediaWiki message delivery (talk) 22:14, 30 November 2015 (UTC)

Please claim your upload(s): File:YonedaLemma-01.png
Hi, This image was seemingly uploaded prior to current image polices, Thank you.

However, as part of ongoing efforts to ensure all media on English Wikipedia is correctly licensed and attributed it would be appreciated if you were able to confirm, that it was your own work, by marking it as own, amending the information added by a third party, and by changing the license to an appropriate "self" variant. You can also add  to the media by uploader tag if it is present to indicate that you've acknowledged the image, and license shown (and updated the information where appropriate).

This will assist those reviewing the many many "free" images on commons that have not yet been transfered to Commons. Sfan00 IMG (talk) 14:56, 6 August 2016 (UTC)

Please claim your upload(s): File:YonedaLemma-01.png
Hi, This media was seemingly uploaded prior to current image polices,

However, due to changes in the copyright situation in some jurisdictions, there is a need to ensure media on English Wikipedia is correctly licensed and attributed. It would be appreciated if you were able to confirm that it was your own work, by marking it as own, Fully completeing the information block, and leaving an acknowledgement on the file description page to indicate that you've accepted the license shown (and updated the information accordingly. If you have other uploads, please consider "claiming" them in a similar manner, You can find a list of files you have created [ here].

If you don't want to keep your media on English Wikipedia, please nominate it for deletion under Criteria G7 of the Criteria for Speedy deletion ShakespeareFan00 (talk) 13:47, 13 September 2018 (UTC)

ShakespeareFan00 (talk) 07:50, 14 September 2018 (UTC)

"Quadratic field extension" listed at Redirects for discussion
An editor has identified a potential problem with the redirect Quadratic field extension and has thus listed it for discussion. This discussion will occur at Redirects for discussion/Log/2022 February 8 until a consensus is reached, and anyone, including you, is welcome to contribute to the discussion. User:1234qwer1234qwer4 (talk) 11:43, 8 February 2022 (UTC)

Nomination of Examples of vector spaces for deletion
A discussion is taking place as to whether the article Examples of vector spaces is suitable for inclusion in Wikipedia according to Wikipedia's policies and guidelines or whether it should be deleted.

The article will be discussed at Articles for deletion/Examples of vector spaces until a consensus is reached, and anyone, including you, is welcome to contribute to the discussion. The nomination will explain the policies and guidelines which are of concern. The discussion focuses on high-quality evidence and our policies and guidelines.

Users may edit the article during the discussion, including to improve the article to address concerns raised in the discussion. However, do not remove the article-for-deletion notice from the top of the article. GeoffreyT2000 (talk) 15:27, 16 February 2022 (UTC)

"Locally small category" listed at Redirects for discussion
An editor has identified a potential problem with the redirect Locally small category and has thus listed it for discussion. This discussion will occur at Redirects for discussion/Log/2022 September 23 until a consensus is reached, and anyone, including you, is welcome to contribute to the discussion. 1234qwer1234qwer4 08:25, 23 September 2022 (UTC)

Proposed deletion of File:UniversalProperty-01.png


The file File:UniversalProperty-01.png has been proposed for deletion&#32;because of the following concern: "Orphaned. Superseded by File:Universal morphism definition.svg"

While all constructive contributions to Wikipedia are appreciated, pages may be deleted for any of several reasons.

You may prevent the proposed deletion by removing the notice, but please explain why in your edit summary or on the file's talk page.

Please consider addressing the issues raised. Removing will stop the proposed deletion process, but other deletion processes exist. In particular, the speedy deletion process can result in deletion without discussion, and files for discussion allows discussion to reach consensus for deletion. Someone who&#39;s wrong on the internet (talk) 09:03, 2 April 2023 (UTC)

Proposed deletion of File:UniversalProperty-02.png


The file File:UniversalProperty-02.png has been proposed for deletion&#32;because of the following concern: "Orphaned. Superseded by File:Universal morphism definition.svg."

While all constructive contributions to Wikipedia are appreciated, pages may be deleted for any of several reasons.

You may prevent the proposed deletion by removing the notice, but please explain why in your edit summary or on the file's talk page.

Please consider addressing the issues raised. Removing will stop the proposed deletion process, but other deletion processes exist. In particular, the speedy deletion process can result in deletion without discussion, and files for discussion allows discussion to reach consensus for deletion. Someone who&#39;s wrong on the internet (talk) 09:05, 2 April 2023 (UTC)

"Quotient map" listed at Redirects for discussion
The redirect [//en.wikipedia.org/w/index.php?title=Quotient_map&redirect=no Quotient map] has been listed at redirects for discussion to determine whether its use and function meets the redirect guidelines. Anyone, including you, is welcome to comment on this redirect at  until a consensus is reached. 1234qwer1234qwer4 11:26, 18 April 2023 (UTC)