Wikipedia talk:WikiProject Mathematics

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Attention needed at Brahmagupta's function

I came across this article in the new pages queue, but I don't have the technical knowledge to evaluate it properly. I can't tell if it overlaps at all with Brahmagupta's formula, and the two provided book references don't have page numbers. Any attention from project members would be appreciated! Lord Bolingbroke (talk) 04:53, 29 January 2025 (UTC)

If it is independently notable at all it is not under this name. Google Scholar search for "Brahmagupta's function" did not match any articles. And we have no evidence Brahmagupta had any connection with this function, which is connected to modern number theory. I would almost suggest that it is a hoax, except that the function itself is a piece of actual mathematics. —David Eppstein (talk) 07:30, 29 January 2025 (UTC)

Thank you for the reply. I have draftified the page pending the addition of sources to verify Brahmagupta's connection to the function. Lord Bolingbroke (talk) 18:18, 29 January 2025 (UTC)

Expressing certain symbols with math tags

I've been transcribing some equations for a work on Wikisource, and I need to draw a few symbols that appear in the equations: a semicircle (open, with the semicircle being the right half of the circle) and a rectangle (short and wide). I haven't figured out how to put them in, can anyone here help? Arcorann (talk) 05:54, 31 January 2025 (UTC)

Maybe try https://detexify.kirelabs.org/ ? —David Eppstein (talk) 07:03, 31 January 2025 (UTC)

Without context it is difficult to know exactly what the symbols you're talking about are. 100.36.106.199 (talk) 03:25, 1 February 2025 (UTC)

Are any of the following characters good for the rectangle? Right side is the decimal value.

▭: 9645

▯: 9647

▮: 9646

▬: 9644 Apersoma (talk) 13:51, 6 February 2025 (UTC)

Using decimal to identify Unicode is awkward; most readers familiar with Unicode will expect hexadecimal and some will interprete, e.g., 9656 as a reference to U+9645 际 CJK UNIFIED IDEOGRAPH-9645 rather than to U+25AD ▭ WHITE RECTANGLE.

Is there wiki LaTeX support for U+25AC ▬ BLACK RECTANGLE, U+25AD ▭ WHITE RECTANGLE, U+25AE ▮ BLACK VERTICAL RECTANGLE and U+25AF ▯ WHITE VERTICAL RECTANGLE? -- Shmuel (Seymour J.) Metz Username:Chatul (talk) 16:01, 6 February 2025 (UTC)

$\blacksquare$ and $\Box ,\square$ seem to work here, but yield squares. - Jochen Burghardt (talk) 18:48, 6 February 2025 (UTC)

Usually in LaTeX you could also use \fbox, \framebox, or similar, but I don't think any comparable thing is supported in Wikipedia's version of LaTeX. –jacobolus (t) 19:34, 6 February 2025 (UTC)

Sometimes you can hack together pieces of rectangles by combining vertical and horizontal rules; it's not ideal, but it can be made to work. An example is the notation $\vert \!{\underline {\,n}}$ appearing in the history section of factorial. —David Eppstein (talk) 23:22, 6 February 2025 (UTC)

Sergio Albeverio page needs cleanup

Would anyone feel like de-CV-ifying the article Sergio Albeverio? XOR'easter (talk) 19:44, 1 February 2025 (UTC)

Waring problem

May someone look at the last comment in the talk page? thanks. 176.206.33.66 (talk) 13:34, 4 February 2025 (UTC)

You mean the discussion of $g(4)$? Dedhert.Jr (talk) 13:44, 4 February 2025 (UTC)

yes. thanks again 176.206.33.66 (talk) 14:01, 4 February 2025 (UTC)

Algebraic normal form

There's a long-standing proposal to merge Reed–Muller expansion and Zhegalkin polynomial into Algebraic normal form, on the grounds of overlap and/or context. It would be helpful if someone with a little mathematic knowledge had a go at either completing the merge (given that it is currently unopposed), or objecting. You can contribute to the discussion at Talk:Algebraic normal form. Klbrain (talk) 16:46, 5 February 2025 (UTC)