Thank you all for answering me.
It helped a lot, Americans or not :-).

Kolbjoern

Den 19.04.2015 21:29, Brian Barker skreiv:
At 20:46 19/04/2015 +0200, Kolbjørn Stuestøl wrote:
In "Getting started with Math" I found this: "To write function names with primes, as is usual in school notations, you must first add the signs to the catalog". (The catalog is a list of characters in a font). What are "primes" in this context?

Something like a single quotation mark or apostrophe - but different. See http://en.wikipedia.org/wiki/Prime_%28symbol%29 . It's Unicode 2032 and HTML ′ .

How and for what are they used?

I don't know about schools, but mathematicians use them to indicate derivatives, so f'(x) is shorthand for df(x)/dx.

Some Americans (or others) able to explain this to a non American?

Sorry: I'm only an "other".

I trust this helps.

Brian Barker


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