This user is not currently active on Wikipedia. TakuyaMurata has not edited Wikipedia since 29 May 2023. As a result, any requests made here may not receive a response. If you are seeking assistance, you may need to approach someone else.

See the page history to retrieve old threads.

Hello Takuya,

after you reverted twice my deletion of "either" in the statement of Krull's intersection theorem, I write you a few words here:

The English language is not completely accurate when it comes to the use of the word "or". It can mean both inclusive and exclusive or. With "either" it generally speaking means exclusive or, but even there are exceptions, in particular with negation.

But in English as used by mathematicians, the convention is completely clear: "or" means inclusive or and "either ... or" means exclusive or.

In the situation here, inclusive or is correct, so "either" should be deleted.

To say it specifically, the phrase "a proper ideal I in a commutative Noetherian ring that is either a local ring or an integral domain" excludes the case that the ring local and an integral domain. Claus aus Leipzig (talk) 08:21, 17 March 2023 (UTC)Reply[reply]

"the convention is completely clear". I don’t think this is true. For example, one often says "assume either of the following assumptions is true: ...". This does not exclude the possibility more one than one assumption is valid. See for example local criterion for flatness. In fact, in logic, when you say A or B is true, it does not imply it is invalid that both A and B are true. —- Taku (talk) 08:31, 17 March 2023 (UTC)Reply[reply]

The last sentence of your reply is clearly valid. As said, in logic (and in mathematics) "or" means inclusive or, that is, it corresponds to the operator OR in programming languages. Please note that this is the form of sentence present in the article after deleting "either".

Unfortunately, the word "either" has a range of meanings depending on the context, for example there is the phrase "either way" which means "in any case". The phrase you mentioned goes in this direction.

Nonetheless, in mathematics and logic "either .. or" simply means exclusive or, abbreviated by XOR.

According to dictionaries, this is also the case outside of mathematics and logic. In every-day language "either - or" often used in situations involving a choice between two alternatives. Have a look here: [1] or here: [2]

Finally, on your example of the article local criterion for flatness: This is just badly written here in Wikipedia. When one follows the reference, one finds this in Matsumura's book: "In the above notation, suppose that one of the two following conditions is satisfied: ..."

Claus aus Leipzig (talk) 14:06, 17 March 2023 (UTC)Reply[reply]

Perhaps we need a Wikipedia article to tell us what usage is correct :) I did a bit of Googling and I found the following [3]. It includes the example "If x is a real number, then either x≤0 or x≥0". Here the statement does not exclude the possibility x = 0. So, I don’t think your usage is universally followed; maybe some do follow it but I don’t think it is necessary common in mathematics. —- Taku (talk) 05:52, 18 March 2023 (UTC)Reply[reply]

I just added a corresponding section in the talk page of the article Exclusive or; see On the expression "either_– or" in mathematical texts. It has been an interesting discussion already, let's see what comes out of my request there. Claus aus Leipzig (talk) 17:17, 19 March 2023 (UTC)Reply[reply]

An article you recently created, Connes connection, is not suitable as written to remain published. It needs more in-depth coverage about the subject itself, with citations from reliable, independent sources in order to show it meets WP:GNG. It should have at least three, to be safe. And please remember that interviews, as primary sources, do not count towards GNG.(?) 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.Onel5969 ^{TT me} 10:30, 2 April 2023 (UTC)Reply[reply]

I assume the above is a template. So, for example, the interview bit isn’t relevant here. Note that what types of sources are needed really depends on types of article. For math articles, the references in the article seem enough; for instance, the notability is quite clear in this case. —- Taku (talk) 10:44, 2 April 2023 (UTC)Reply[reply]

A discussion is taking place as to whether the article Connes connection 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 Wikipedia:Articles for deletion/Connes connection 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 until the discussion has finished.

Onel5969 ^{TT me} 10:47, 2 April 2023 (UTC)Reply[reply]

Thanks for uploading File:Citizendium logo400grbeta small fairuse.png. The image description page currently specifies that the image is non-free and may only be used on Wikipedia under a claim of fair use. However, the image is currently not used in any articles on Wikipedia. If the image was previously in an article, please go to the article and see why it was removed. You may add it back if you think that that will be useful. However, please note that images for which a replacement could be created are not acceptable for use on Wikipedia (see our policy for non-free media).

Note that any non-free images not used in any articles will be deleted after seven days, as described in section F5 of the criteria for speedy deletion. Thank you. Snowmanonahoe (talk) 17:32, 7 April 2023 (UTC)Reply[reply]

Wow, this template is... really bad. I'll save you a click, that is an image of Citizendium's beta logo, the beta tag has since been removed so that's what's being used instead. That's all. Snowmanonahoe (talk) 17:40, 7 April 2023 (UTC)Reply[reply]

A discussion is taking place as to whether the article Yokota, Shimane 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 Wikipedia:Articles for deletion/Yokota, Shimane 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 until the discussion has finished.

Iljhgtn (talk) 21:49, 27 June 2023 (UTC)Reply[reply]

Hello, TakuyaMurata. It has been over six months since you last edited the Articles for Creation submission or Draft page you started, "Hamiltonian group action".

In accordance with our policy that Wikipedia is not for the indefinite hosting of material deemed unsuitable for the encyclopedia mainspace, 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.

Thanks for your submission to Wikipedia, and happy editing. Liz ^{Read! Talk!} 16:23, 13 August 2023 (UTC)Reply[reply]

Nominations for the upcoming project coordinator election have opened. A team of up to ten coordinators will be elected for the next coordination year. The project coordinators are the designated points of contact for issues concerning the project, and are responsible for maintaining our internal structure and processes. They do not, however, have any authority over article content or editor conduct, or any other special powers. More information on being a coordinator is available here. If you are interested in running, please sign up here by 23:59 UTC on 14 September! Voting will commence on 15 September. If you have any questions, you can contact any member of the current coord team. MediaWiki message delivery (talk) 02:05, 2 September 2023 (UTC)Reply[reply]

The redirect Draft:Semiabelian groups 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 Wikipedia:Redirects for discussion/Log/2023 September 21 § Draft:Semiabelian group until a consensus is reached. scope_creep^Talk 08:51, 21 September 2023 (UTC)Reply[reply]

HJello. Might you be able to help out with answering this question: Wikipedia:Reference desk/Mathematics § Notation of representations? Thx.  --Lambiam 22:57, 14 November 2023 (UTC)Reply[reply]

Hello! Voting in the 2023 Arbitration Committee elections is now open until 23:59 (UTC) on Monday, 11 December 2023. All eligible users are allowed to vote. Users with alternate accounts may only vote once.

The Arbitration Committee is the panel of editors responsible for conducting the Wikipedia arbitration process. It has the authority to impose binding solutions to disputes between editors, primarily for serious conduct disputes the community has been unable to resolve. This includes the authority 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 in the 2023 election, please review the candidates and submit your choices on the voting page. If you no longer wish to receive these messages, you may add ((NoACEMM)) to your user talk page. MediaWiki message delivery (talk) 00:20, 28 November 2023 (UTC)Reply[reply]

Voting is now open for the WikiProject Military History newcomer of the year and military historian of the year awards for 2023! The the top editors will be awarded the coveted Gold Wiki . Cast your votes vote here and here respectively. Voting closes at 23:59 on 30 December 2023. On behalf of the coordinators, wishing you the very best for the festive season and the new year. Hawkeye7 (talk · contribs) via MediaWiki message delivery (talk) 23:56, 22 December 2023 (UTC)Reply[reply]

The article Osaka University of Pharmaceutical Sciences has been proposed for deletion because of the following concern:

Unnotable. Only references I can find very briefly mention the subject, or are academic ranking websites.

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 ((proposed deletion/dated)) notice, but please explain why in your edit summary or on the article's talk page.

Please consider improving the page to address the issues raised. Removing ((proposed deletion/dated)) will stop the proposed deletion process, but other deletion processes exist. In particular, the speedy deletion process can result in deletion without discussion, and articles for deletion allows discussion to reach consensus for deletion. 🌺 Cremastra (talk) 13:41, 13 January 2024 (UTC)Reply[reply]

A discussion is taking place as to whether the article Foreign-born Japanese 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 Wikipedia:Articles for deletion/Foreign-born Japanese 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 until the discussion has finished.

Tooncool64 (talk) 01:52, 21 January 2024 (UTC)Reply[reply]