81.6.34.169

September 2024

Hello, I'm DVdm. I noticed that you added or changed content in an article, Cis (mathematics), but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at referencing for beginners. If you think I made a mistake, you can leave me a message on my talk page. Thank you. DVdm (talk) 03:24, 15 September 2024 (UTC)

If this is a shared IP address, and you did not make the edits referred to above, consider creating an account for yourself or logging in with an existing account so that you can avoid further irrelevant notices.

Please do not add or change content, as you did at Cis (mathematics), without citing a reliable source. Please review the guidelines at Wikipedia:Citing sources and take this opportunity to add references to the article. Thank you. DVdm (talk) 22:59, 15 September 2024 (UTC)

Note: one of the reasons why we need sources is to demonstrate notability of the content that appears in Wikipedia. Your claim can be as true as 1+1=2, but if nobody has ever published the content, it cannot be taken on board here — by design. See also wp:no original research. - DVdm (talk) 23:07, 15 September 2024 (UTC)

If this is a shared IP address, and you did not make the edits referred to above, consider creating an account for yourself or logging in with an existing account so that you can avoid further irrelevant notices.

---