Can this Laplace transform integral be solved with a symbolic integrator?

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SUMMARY

The discussion centers on the challenge of solving the Laplace transform integral $$F(s) = \int^\infty_0 \exp\left( -sx + \frac{i\omega}{1+\lambda x} \right) \, dx$$ where ##s## is complex, ##\omega## is a real constant, and ##\lambda## is a positive real constant. Participants confirm that the integral converges when the real part of ##s## is greater than zero. Despite attempts with various symbolic integrators, users report failures in obtaining a closed-form solution, suggesting that numerical methods may be the only viable option. A resource, http://www.mathtable.com/gr/, is recommended for further assistance.

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strangerep
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I'm up against this Laplace transform integral:
$$F(s) ~:=~ \int^\infty_0 \exp\left( -sx + \frac{i\omega}{1+\lambda x} \right) \, dx $$where ##s## is complex, ##\omega## is a real constant, and ##\lambda## is a positive real constant.

By inspection, I think it should converge, at least for some (nontrivial) domain of values for ##s## and ##\omega## (tell me if I'm wrong). But every symbolic integrator I've tried barfs on it.

I figured I should at least ask here before I give up. :oldfrown:
 
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The only condition you need is the real part of s is > 0.
 
mathman said:
The only condition you need is the real part of s is > 0.
Yes -- I should have noted that in my opening post.

Even so, I still don't know how to perform the integral (other than numerically -- but I want a closed form symbolic expression). :oldfrown:
 

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