Integral of Bessel functions combination?

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SUMMARY

The discussion centers on computing integrals involving combinations of Bessel functions, specifically the integrals of the form int(t**2*BesselJ(1,a*t)*BesselJ(1,b*t)*BesselJ(1,c*t), t=1..w) and int(t**3*BesselJ(1,a*t)*BesselJ(1,b*t)*BesselJ(1,c*t)*BesselJ(1,d*t), t=1..w). Participants express skepticism about the existence of a closed-form expression for these integrals, particularly when substituting BesselJ with BesselY. The consensus indicates that numerical methods may be necessary for evaluation.

PREREQUISITES
  • Understanding of Bessel functions, specifically BesselJ and BesselY.
  • Familiarity with integral calculus and definite integrals.
  • Knowledge of numerical integration techniques.
  • Experience with mathematical software capable of symbolic computation, such as Mathematica or MATLAB.
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  • Explore numerical integration methods in Mathematica for evaluating complex integrals.
  • Research properties and applications of Bessel functions in mathematical physics.
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  • Investigate the differences between BesselJ and BesselY functions and their implications in integral computations.
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Mathematicians, physicists, and engineers working with integral calculus and Bessel functions, particularly those needing to compute complex integrals in applied mathematics or theoretical physics.

aymen10
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I want to ask if you how to compute such integral like:

int(t**2*BesselJ(1,a*t)*BesselJ(1,b*t)*BesselJ(1,c*t), t=1..w)

or

int(t**3*BesselJ(1,a*t)*BesselJ(1,b*t)*BesselJ(1,c*t)*BesselJ(1,d*t), t=1..w)

The same question if any BesselJ is replaced by BesselY.

Thanks
 
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aymen10 said:
I want to ask if you how to compute such integral like:

int(t**2*BesselJ(1,a*t)*BesselJ(1,b*t)*BesselJ(1,c*t), t=1..w)

or

int(t**3*BesselJ(1,a*t)*BesselJ(1,b*t)*BesselJ(1,c*t)*BesselJ(1,d*t), t=1..w)

The same question if any BesselJ is replaced by BesselY.

Thanks

I see no reason to think there is a closed-form expression (not involving integrals) for that.
 

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