Mathematical symbols?

[Merlin66]

https://www.bbc.com/future/article/20191031-hilda-geiringer-mathematician-who-fled-the-nazis

Look at the main image, the formula on the board..........

Something odd?? What's "sen"

Seems to me to be a typo....

[Pepper]

its Spanish. means sine amongst other things..

[ab1963]

Hi Ken

"Sen" is the standard abbreviation for "seno" in Spanish and means the sine function.

[Merlin66]

Looks like you're correct!
Didn't think of that........

[bojan]

Interesting, I always thought at least mathematical symbols are standardized...

On the other hand, Spaniards also use inverted "?" so ..

[gary]

It wouldn't surprise me if Spanish had different conjugations for the word
sine depending on whether :-

I do the sine function
You (familiar) do the sine function
You (formal) do the sine function
He does the sine function
She does the sine function
We all do the sine function
You all (familiar) do the sine function
You all (formal) do the sine function
They (them over there) do the sine function

... and then a whole lot of additional permutations depending on whether performing the sine function was done in the past, present or future! :lol:

[ChrisV]

Sine qua non

[julianh72]

An interesting interactive description of the etymology of the names of the trigonometric functions:
https://mathisonian.github.io/trig/etymology/

The word sine originally came from the latin sinus, meaning "bay" or "inlet". However, it had a long path to get there. The earliest known reference to the sine function is from Aryabhata the Elder, who used both ardha-jya (half-chord) and jya (chord) to mean sine in Aryabhatiya, a Sanskrit text finished in 499 CE.
Jya, meaning chord, became jiba in Arabic, and was abbreviated as just jb. When the term was translated to latin in the twelfth century, jb was incorrectly read as jaib (meaning "bay" or "inlet"), and thus translated as sinus.

I assume that the Spanish / Portuguese word "seno" just came along as the local translation of the Latin "sinus".

[gary]

Hi Julian

Google translate also offers the translation of "seno" from Spanish
to English as a word for "breast".

Perhaps it is what hot-blooded Latin speakers think of when they see
sine wave curves? :shrug:

[sil]

The best thing about Standards is there are so many to choose from ;)

[sil]

LOL, I think there's a good research paper in studying the Jiggle Wave here somewhere, probably good grant money too.

[AstralTraveller]

Been done. Some mob here developed a 'smart bra' for larger women playing sport. They used to call for (women) volunteers to be filmed (wearing T-shirt was OK) jogging with and without a bra. All done very discretely of course and not put on U-Tube.