Toronto Math Forum

APM346-2018S => APM346--Lectures => Topic started by: Jingxuan Zhang on February 07, 2018, 06:19:32 AM

Title: Another erf
Post by: Jingxuan Zhang 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?
Title: Re: Another erf
Post by: Victor Ivrii on February 07, 2018, 06:44:17 AM
Yes, the canonical definition is as in the textbook.