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Unexpected difference between functions plots involving oscillatory integrals

Reza rho
Posted 2 months ago

I'm trying to plot three functions involving oscillatory integrals.

I also implemented these functions in Python using SciPy, and the plots there look similar for all three functions. However, in Mathematica, the curves differ. What is the reason? Which one is correct? Python or Wolfram?
this is the link of the Python code which you can run it in colab

Here's my code in Mathematica 11:
POSTED BY: Reza rho
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POSTED BY: Gianluca Gorni

Try using "MultiPeriodic" method instead of "GlobalAdaptive" i would guess is better for this type of integral.
POSTED BY: Bruno Tenorio
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