# error function!!

• May 10th 2013, 05:54 AM
kereshmeh
error function!!
Hi
I have a problem I hope you can help me solve. I am working with the error function. I have looked at
some papers involving all the combinations of this function with other functions and their integrations, but this particular model is not listed in there:

int{erf(a*sqrt((x-a)^2+b^2))))/((x-a)^2+b^2)} with respect to x

I would really appreciate it if you let me know which formula you think I should use to derive this integral.
Many thanks
• May 10th 2013, 05:23 PM
chiro
Re: error function!!
Hey kereshmeh.

Try using a substitution formula for u = (x-a)^2 and see where that takes you.
• May 10th 2013, 09:25 PM
ibdutt
Re: error function!!
Please recheck if the question has been written correctly.
• May 11th 2013, 07:19 PM
kereshmeh
Re: error function!!
It's correct
what is the problem
• May 11th 2013, 09:05 PM
ibdutt
Re: error function!!
Note the number of pairs of parenthesis in the numerator
• May 12th 2013, 12:45 AM
kereshmeh
Re: error function!!