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

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Discussion Overview

The discussion revolves around the solvability of a specific Laplace transform integral involving complex and real constants. Participants explore the conditions for convergence and the challenges faced with symbolic integration tools.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested, Mathematical reasoning

Main Points Raised

  • One participant presents the integral and suggests it should converge for some domain of values for ##s## and ##\omega##.
  • Another participant asserts that the only necessary condition for convergence is that the real part of ##s## is greater than 0.
  • A later reply acknowledges the condition for convergence but expresses uncertainty about obtaining a closed form for the integral, indicating a preference for symbolic solutions over numerical methods.
  • Another participant points out that the original post did not explicitly request a closed form solution and suggests a resource that might assist with the integration.

Areas of Agreement / Disagreement

Participants generally agree on the condition for convergence regarding the real part of ##s##, but there is no consensus on how to solve the integral symbolically, as some express frustration with the limitations of symbolic integrators.

Contextual Notes

Participants note the dependence on the real part of ##s## for convergence, but the discussion does not resolve the mathematical steps necessary for finding a closed form solution.

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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