# Negative Derivative

1. Jul 14, 2009

### EngWiPy

Hello,

What negative derivative means like this one:

$$\frac{\partial^{-1}}{\partial\,x^{-1}}$$

Regards

2. Jul 14, 2009

### HallsofIvy

I honestly have never seen such a notation but I would suspect the "inverse" derivative is the anti-derivative or indefinite integral. (I have seen this written "D-1 f" for anti-derivative.)

3. Jul 14, 2009