I have a question. I try to integrate this function:
Integrate[Exp[I k z]*Exp[-Sqrt[k^2 - A^2]x]*Exp[-k^2*L^2/4]/Sqrt[k^2 - A^2],
{k, -Infinity, -A}]
But Mathematica doesn't want to give an answer. It just prints me my integral.
The same story I have when I try to calculate the residue of this function at the infinity point, for example.
What's wrong?
Thanks.
NIntegrate
if a numeric solution is enough for you. $\endgroup$