# Math in quantum physics

1. Apr 19, 2015

### TimeRip496

-∞(e(-x2)/(x02)) dx =π0.5x0

How do you get this? Sorry my math sucks.

2. Apr 19, 2015

### ShayanJ

3. Apr 19, 2015

### mathman

The standard normal distribution has a density function $f(x)=\frac{1}{\sqrt {2\pi}}e^{-\frac{x^2}{2}}$ with $\int_{-\infty}^{\infty}f(x)dx=1$.

Make the appropriate change of variables and you get the equation you have.