Take the 2-minute tour ×
Mathematics Stack Exchange is a question and answer site for people studying math at any level and professionals in related fields. It's 100% free, no registration required.

I am not an English speaker that is why I asked this question. In addition, I think english.stackexchange.com is not the proper place to ask this because (I am so sorry) I don't think most of them know mathematics deeply.

How do you pronounce the following derivatives in English?

  1. $\frac{\textrm{d}y}{\textrm{d}x}$
  2. $\frac{\textrm{d}^2y}{\textrm{d}x^2}$
  3. $\frac{\partial y}{\partial x}$
  4. $\frac{\partial^2 y}{\partial x^2}$
  5. $\frac{\partial^3 y}{\partial x^2\partial z}$

Feel free to edit the tag if it has been chosen incorrectly.

For example, is it correct if I pronounce $\frac{\textrm{d}y}{\textrm{d}x}$ as "dee wai over dee eks"?

share|improve this question
1  
See math.stackexchange.com/questions/110565/…, though I don't think it's an exact duplicate. –  joriki Mar 15 '12 at 14:22
    
that's exactly how I say it. –  Holdsworth88 Mar 15 '12 at 14:22

2 Answers 2

up vote 5 down vote accepted

This is how I personally pronounce them:

  1. I pronounce it either "dee wai over dee eks" or simply "dee wai dee eks".
  2. I occasionally pronounce it as "dee squared wai over dee eks squared", but more often I just refer to it as "the second derivative of y with respect to x".
  3. "Partial of y with respect to x." Very occasionally as "del wai del eks".
  4. As with 2, I usually just call this "the second partial of y with respect to x".
  5. "del cubed y over del $x^2$ del z", but if we have $y=f(x,z)$, I'd much prefer referring to it as $f_{zxx}$.
share|improve this answer
3  
del means something different –  Elements in Space Jan 5 '13 at 14:05

3. $$ \frac{\partial y}{\partial x}\rightarrow\text{day wai, day eks}$$

5. $$ \frac{\partial^3 y}{\partial x^2\partial z}\rightarrow\text{day cubed wai, day eks squared, day zee}$$

6. $$\nabla F\rightarrow\text{del eff}$$

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.