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User talk:Mathsci

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Arbitration clarification request closed

This is a message to inform you that a request for clarification has now been closed and following motion has been passed. The Arbitration Committee resolves by motion that

In May 2012 (during the Race and intelligence review), the committee prohibited SightWatcher (talk · contribs) from "participating in any discussion concerning the conduct of editors who have worked in the topic" – and therefore from discussing Mathsci's conduct. In October 2012, The Devil's Advocate (talk · contribs) and Cla68 (talk · contribs) were banned (by an administrator acting under discretionary sanctions) from interacting with Mathsci. In December 2012, Mathsci was prohibited (again under discretionary sanctions) by an arbitration enforcement administrator from requesting enforcement of these interaction bans without prior permission. The Arbitration Committee has decided to change these from one-way to two-way interaction bans. Accordingly, Mathsci (talk · contribs) is indefinitely prohibited from:

This motion should be enforced under the enforcement clauses of the Race and intelligence final decision.

For the Arbitration Committee, Callanecc (talkcontribslogs) 09:14, 17 September 2013 (UTC)

AE request concerning you

Hello. An enforcement request concerning you has been made at Wikipedia:Arbitration/Requests/Enforcement#Mathsci. Please make a statement there. Thanks,  Sandstein  10:19, 4 October 2013 (UTC)

Please add any statement you wish to make to that section within 24 hours, i.e., until 07:30, 6 October 2013 (UTC). If you choose not to make a statement within that time frame, the request may be acted upon regardless.  Sandstein  07:20, 5 October 2013 (UTC)

ArbCom Clarification request concerning you

Hello. A clarification request concerning you has been made here. Please make a statement there. Thank you. Cla68 (talk) 23:10, 6 October 2013 (UTC)

Arbitration clarification request closed

This is a message to inform you that a request for clarification has now been closed and following motion has been passed. The Arbitration Committee resolves by motion that

For posting inappropriate material relating to an editor with whom he is subject to an interaction restriction, Mathsci is indefinitely banned from the English Wikipedia. He may request reconsideration of the ban not less than six months from the date this motion passes.

For the Arbitration Committee, Rschen7754 09:05, 13 October 2013 (UTC)

As an administrator, I have implemented the remedy above. --Rschen7754 09:06, 13 October 2013 (UTC)

Sorry to see this Mathsci. Hope you'll try to come back after the six month period. Use the time wisely in RL!--regentspark (comment) 13:45, 13 October 2013 (UTC)

@RegentsPark: I noticed that you're running for election again and that you are well over 18. Both of those are good things ... or are they? Good luck anyway!
I also noticed that the image on my user page taken in the Cemetery at La Treille was already on Commons. Another image uploaded simultaneously had not been transferred, so I did it manually. Surprisingly within a few hours the image showed up on Both images are of high quality even if they were taken on a cloudy Sunday morning in March. Mathsci (talk) 08:05, 17 November 2013 (UTC)

File:Samuel-Palmer-magic-apple-tree.png listed for deletion

A file that you uploaded or altered, File:Samuel-Palmer-magic-apple-tree.png, has been listed at Wikipedia:Files for deletion. Please see the discussion 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. ALH (talk) 00:46, 14 January 2014 (UTC)

Restoring Talk Page Access

With permission of Masthsci I post below the text of two email he sent me

Email 1:

... I was composing this response on my talk page which I'm now sending directly to you:
I think I might now understand how WP:BAN applies. It is different from an indefinite block. Even if there are clear problems with the editing of particular articles, the terms of WP:BAN disallow banned users, even if they are experts on the subject, from making any kind of comments, direct or indirect. Although paradoxically that might not benefit particular articles on the encyclopedia, it is technically how the rules of WP:BAN work. It has nothing to do with my competence as an editor which I do not believe administrators are questioning.
It is paradoxical, but I understand that those are the rules.

Email 2

Thanks for the message on my talk page.I hope that my understanding, as written below, was correct. I certainly undertake that while blocked I will not use my talk page to make comments on how articles are being edited even if something horrendous is going on. Those are the rules of WP:BAN.
I hope I've understood correctly.

On the basis of these assurances I am satisfied that Mathsci now 'gets it' that he may not use his talkpage to canvass for proxy edits. On that basis I have restored his talkpage access. It goes without saying that any further evidence of using either his talkpage or wikipedia email to canvass edits will result in both being removed instantly. Spartaz Humbug! 17:43, 11 February 2014 (UTC)

Thanks, Spartaz (and EdJohnston). Mathsci (talk) 18:09, 11 February 2014 (UTC)

Representation theory of the Lorentz group

Hi Mathsci!

I see you originally wrote the section on infinite-dimensional unitary representations. I have been working a lot on the article, and I was thinking about small expansions in the infinite-dimensional section too. First order of business; would you mind if I change the action in the principal series from

\pi_{\nu,k}\begin{pmatrix}a& b\\ c& d\end{pmatrix}^{-1}f(z)=|cz+d|^{-2-i\nu} \left({cz+d\over |cz+d|}\right)^{-k}f\left({az+b\over cz+d}\right).


\pi_{\nu,k}\begin{pmatrix}a& b\\ c& d\end{pmatrix}f(z)=|-bz+d|^{-2-i\nu} \left({-bz+d\over |-bz+d|}\right)^{-k}f\left({az-c\over -bz+d}\right)

and correspondingly for the complementary series? (It should be equivalent as far as I can see.) This way I can source it (to A. Knapp - Representation Theory of Semisimple Groups).

Let me know if I make any suspect edits in the infinite-dimensional section. I have already written a couple of "introductory" sections to make the trasition "smoother" for the reader from the finite-dimensional case. I don't know when I'll get to this, but it is in my plans. Initially, I'm thinking about including proof outlines, sourced to Knapp's book. YohanN7 (talk) 22:26, 18 April 2014 (UTC)

There is no harm in including both versions—they are trivially equivalent—if the aim is to make things more accessible for beginners while remaining clear to readers already familiar with the subject. The formulas using inverses conform to what is normally found in the theory of automorphic forms, one of the main applications of the infinite-dimensional representation theory (cf the classic text by Gelfand et al). Mathsci (talk) 06:38, 19 April 2014 (UTC)
Both will go in then. Is the Gelfand et al text in the references section (I recon it's a book, not a paper)? I thought the two there were papers from journals. Can the expression for the complementary series be found in the same text? YohanN7 (talk) 13:59, 19 April 2014 (UTC)
It's the book cited in uniformly bounded representations, amongst other wikipedia articles. Mathsci (talk) 20:53, 19 April 2014 (UTC)
I think conversations like this should be done over email rather then on your talkpage. Its a bit close to the areas we agreed you would stay away from. Thanks. Spartaz Humbug! 20:05, 22 April 2014 (UTC)

Precious again

Cornflower blue Yogo sapphire.jpg

Bach music
Thank you for treating Bach's instrumental music with profound knowledge, namely Clavier-Übung III and now Orgelbüchlein, - repeating: you are an awesome Wikipedian (4 December 2009)!

--Gerda Arendt (talk) 08:18, 21 March 2012 (UTC)

Cherry blossom Frauenstein.JPG

Precious and missed

Two years ago, you were the 102nd recipient of my PumpkinSky Prize, --Gerda Arendt (talk) 11:39, 21 April 2014 (UTC)

Thanks. Mathsci (talk) 23:32, 21 April 2014 (UTC)

Hi Mathsci. Echoing Gerda. Still precious and still missed :) --regentspark (comment) 15:05, 14 October 2014 (UTC)

Thanks again. Mathsci (talk) 19:16, 14 October 2014 (UTC)

WP Cities in the Signpost

The WikiProject Report would like to focus on WikiProject Cities for a Signpost article. This is an excellent opportunity to draw attention to your efforts and attract new members to the project. Would you be willing to participate in an interview? If so, here are the questions for the interview. Just add your response below each question and feel free to skip any questions that you don't feel comfortable answering. Multiple editors will have an opportunity to respond to the interview questions, so be sure to sign your answers. If you know anyone else who would like to participate in the interview, please share this with them. Have a great day. –Mabeenot (talk) 17:16, 7 June 2014 (UTC)

Possibly unfree File:Dornenkroenung-Wildunger-Altar-Konrad-von-Soest.jpg

A file that you uploaded or altered, File:Dornenkroenung-Wildunger-Altar-Konrad-von-Soest.jpg, has been listed at Wikipedia:Possibly unfree files because its copyright status is unclear or disputed. If the file's copyright status cannot be verified, it may be deleted. You may find more information on the file description page. You are welcome to add comments to its entry at the discussion if you object to the listing for any reason. Thank you. Magog the Ogre (t c) 20:17, 26 June 2014 (UTC)

@Magog the Ogre: a two-dimensional image of a late 14th or early 15th century painting, so undoubtedly in the public domain. Mathsci (talk) 21:32, 26 June 2014 (UTC)


... that Bartholomäus Gesius wrote the melody of the Easter hymn which Bach used to conclude the Easter section of his Orgelbüchlein?

Thank you for Orgelbüchlein, --Gerda Arendt (talk) 23:34, 12 April 2015 (UTC)

Precious again and still

Cornflower blue Yogo sapphire.jpg

Bach music
Thank you for treating Bach's instrumental music with profound knowledge, namely Clavier-Übung III and now Orgelbüchlein, - repeating: you are an awesome Wikipedian (4 December 2009)!

--Gerda Arendt (talk) 08:18, 21 March 2012 (UTC)

Three years ago (and a month, missed it, - I gave you this on Bach's birthday with intention), you were the 67.5th recipient of my PumpkinSky Prize ;) - thank you for what do for Bach, great images recently! --Gerda Arendt (talk) 09:11, 21 April 2015 (UTC)

Definitely missed. It's been three years plus. Isn't that long enough? --regentspark (comment) 02:34, 10 August 2015 (UTC)
It was just under two years ago. Mathsci (talk) 15:42, 10 August 2015 (UTC)