Welcome!

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Hi, QuietSisyphus. Welcome to Wikipedia! Thank you for your contributions. I hope you like the place and decide to stay. Our intro page contains a lot of helpful material for new users—please check it out! If you need help, visit Wikipedia:Questions, ask me on my talk page, or ask a question on your talk page. Ugog Nizdast (talk) 11:41, 20 October 2018 (UTC)Reply

Copyvio

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  Your addition to Paul Muhly has been removed in whole or in part, as it appears to have added copyrighted material to Wikipedia without evidence of permission from the copyright holder. If you are the copyright holder, please read Wikipedia:Donating copyrighted materials for more information on uploading your material to Wikipedia. For legal reasons, Wikipedia cannot accept copyrighted material, including text or images from print publications or from other websites, without an appropriate and verifiable license. All such contributions will be deleted. You may use external websites or publications as a source of information, but not as a source of content, such as sentences or images—you must write using your own words. Wikipedia takes copyright very seriously and persistent violators of our copyright policy will be blocked from editing. See Wikipedia:Copying text from other sources for more information. Photograph from https://math.uiowa.edu/people/paul-muhly — Preceding unsigned comment added by Meeanaya (talkcontribs) 06:31, 19 July 2019 (UTC)Reply

Community Insights Survey

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RMaung (WMF) 16:25, 10 September 2019 (UTC)Reply

Reminder: Community Insights Survey

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RMaung (WMF) 15:35, 20 September 2019 (UTC)Reply

Reminder: Community Insights Survey

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RMaung (WMF) 20:35, 3 October 2019 (UTC)Reply

Feedback

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Hi, I left feedback for your sandbox here. Thanks, Elysia (Wiki Ed) (talk) 18:06, 15 October 2019 (UTC)Reply

Welcome and References

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Hi @QuietSisyphus: Please have a look at the WP:REFB, which may help with references. scope_creepTalk 10:39, 19 October 2019 (UTC)Reply

Welcome!

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Hi QuietSisyphus,

Thank you for your contributions to wikipedia by creating the Ultragraph C*-algebra page! If you'd like some suggestions for improving it, here we go:

Introduction

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In the first paragraph there should be an introduction to the subject which is accessible as possible to a wider mathematical audience. This means someone with enough mathematical maturity who doesn't posses much knowledge about the general subject (meaning C*-algebras) could get the gist of what this topic is about. Here's some questions I had while reading the first paragraph:

  • What is an ultragraph? (there should be a separate page eventually spelling out why someone would study an ultragraph) Although you define it in the first paragraph, I have no idea why I should care about this mathematical structure, or what it accomplishes.
  • What are partial isometries? Do you mean partial isometries of an ultragraph? If so, then this should be defined inside a later portion of the article, or inside of the ultragraph article. I would never assume somebody understands what this is.
  • What are Exel–Laca algebras? (I can't find a definition in this article)

Here's another way you could rewrite the first sentence and structure the introductory article:

In mathematics, an ultra-graph C*-algebra is a subclass of C*-algebras generated by the set of partial isometries on a fixed ultragraph.

Also, a lot of people come to wikipedia to find guiding intuition when they encounter a new subject. How can you embed that intuition into the article? Also, how can you embed that into the intro?

Definition

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I recommend creating a separate section for the definition, and creating subsections discussing any technical nuances, explanations, or confusing points which should be elaborated upon. Furthermore, include a subsection discussing Exel–Laca algebras is they are an important sub-part of this subject.

Examples

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It is always best if there is an examples section of a mathematics article. Please include examples that inform the reader what ultragraph C*-algebras are, and why they are important.

Properties/Theorems

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I recommend including a section about any important properties or theorems about these kinds of algebras. This gives the reader a sense of the subject and what is known. Furthermore, you could include any major open questions or conjectures as a subsection.

Applications

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You could also include a section relating this subject to other subjects, such as K-theory of C*-algebras, or noncommutative geometry, etc. How should mathematicians see this subject in a wider context? How does it relate to other fields?

Citations

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Another improvement is to add citations whenever a new concept or claim is introduced. For example, you could cite specific pages in Tomforde's article which give the definitions of each object considered. One useful improvement is to also use a superscript denoting the specific page in the article. For example, you could write

An ultragraph is a quadruple   such that ... denotes the collection of nonempty subsets of  [1]pg 33

I also recommend including links to preprints, such as the arxiv, or links to numdam, eudml, etc that give open access to the articles.

Wundzer (talk) 20:48, 6 September 2020 (UTC)Reply

Eberhard Kirchberg moved to draftspace

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An article you recently created, Eberhard Kirchberg, is not suitable as written to remain published. It needs more citations from reliable, independent sources. (?) Information that can't be referenced should be removed (verifiability is of central importance on Wikipedia). I've moved your draft to draftspace (with a prefix of "Draft:" before the article title) where you can incubate the article with minimal disruption. When you feel the article meets Wikipedia's general notability guideline and thus is ready for mainspace, please click on the "Submit your draft for review!" button at the top of the page. Hitro talk 07:05, 8 February 2023 (UTC)Reply

Your submission at Articles for creation: Eberhard Kirchberg (July 1)

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Your recent article submission to Articles for Creation has been reviewed. Unfortunately, it has not been accepted at this time. The reason left by 97198 was:  The comment the reviewer left was: Please check the submission for any additional comments left by the reviewer. You are encouraged to edit the submission to address the issues raised and resubmit after they have been resolved.
97198 (talk) 13:24, 1 July 2023 (UTC)Reply

CS1 error on Flint Hills

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  Hello, I'm Qwerfjkl (bot). I have automatically detected that this edit performed by you, on the page Flint Hills, may have introduced referencing errors. They are as follows:

  • A "bare URL and missing title" error. References show this error when they do not have a title. Please edit the article to add the appropriate title parameter to the reference. (Fix | Ask for help)

Please check this page and fix the errors highlighted. If you think this is a false positive, you can report it to my operator. Thanks, Qwerfjkl (bot) (talk) 06:32, 21 August 2023 (UTC)Reply

Your submission at Articles for creation: Eberhard Kirchberg (November 29)

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Your recent article submission to Articles for Creation has been reviewed. Unfortunately, it has not been accepted at this time. The reason left by Turnagra was:  The comment the reviewer left was: Please check the submission for any additional comments left by the reviewer. You are encouraged to edit the submission to address the issues raised and resubmit after they have been resolved.
Turnagra (talk) 17:36, 29 November 2023 (UTC)Reply
 
Hello, QuietSisyphus! Having an article draft declined at Articles for Creation can be disappointing. If you are wondering why your article submission was declined, please post a question at the Articles for creation help desk. If you have any other questions about your editing experience, we'd love to help you at the Teahouse, a friendly space on Wikipedia where experienced editors lend a hand to help new editors like yourself! See you there! Turnagra (talk) 17:36, 29 November 2023 (UTC)Reply

Concern regarding Draft:Eberhard Kirchberg

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  Hello, QuietSisyphus. This is a bot-delivered message letting you know that Draft:Eberhard Kirchberg, a page you created, has not been edited in at least 5 months. Drafts that have not been edited for six months may be deleted, so if you wish to retain the page, please edit it again or request that it be moved to your userspace.

If the page has already been deleted, you can request it be undeleted so you can continue working on it.

Thank you for your submission to Wikipedia. FireflyBot (talk) 09:06, 4 May 2024 (UTC)Reply

Your draft article, Draft:Eberhard Kirchberg

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Hello, QuietSisyphus. It has been over six months since you last edited the Articles for Creation submission or draft page you started, "Eberhard Kirchberg".

In accordance with our policy that Wikipedia is not for the indefinite hosting of material, the draft has been deleted. When you plan on working on it further and you wish to retrieve it, you can request its undeletion. An administrator will, in most cases, restore the submission so you can continue to work on it.

Thank you for your submission to Wikipedia, and happy editing. Extraordinary Writ (talk) 09:31, 3 June 2024 (UTC)Reply

  1. ^ Tomforde, Mark (2003-08-05). "Simplicity of ultragraph algebras". arXiv:math/0106162.