I was taught to call f' "f dash". It stands for the derivative of the function.

I know it as "f prime (of x)".
Hi Snowie.

Übliche Sprechweise (auch von Muttlersprachlern) in englischsprachigen Mathematik/Physik-Vorlesungen.

f stroke
It wasn't in my math classes. There could very well be an AE/BE difference.

Thx.

Hi Wupper! :)
Long time no read!

In the US, a', b', etc. is spoken a prime, b prime, etc. The first derivative f'(x) is also therefore called 'f prime of x' or 'the first derivative of f of x'.

It is 'the first derivative of f with respect to x'.

This link gives a useful guide to (one version of) pronunciation of maths symbols:
http://www.uefap.com/speaking/symbols/symbols.htm

A different set of pronunciations is at:

http://rpi.edu/dept/math/ms_graduate/resource...

One gives f dash, the other gives f prime.

eff stroke???

I've been in this business a long time and f' has always been pronounced "eff prime" irrespective of whether it's an AE or BE speaker.

f prime

Ich kenne nur "prime", das wird an meiner Uni in Kalifornien von allen Profs und Studenten verwendet.