### Author Topic: Another erf  (Read 1015 times)

#### Jingxuan Zhang

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##### Another erf
« on: February 07, 2018, 06:19:32 AM »
In a post last year erf was given by
$$\text{erf}_1(z)=\sqrt{\frac{2}{\pi}}\int_0^z e^{-s^2/2} \,ds$$
I assume this is not equivalent to our erf, and in fact $\text{erf}(z/\sqrt{2})=\text{erf}_1(z)$. Am I right? How does this difference affect the solution, if any at all?
« Last Edit: February 07, 2018, 06:39:36 AM by Victor Ivrii »