An integral about Bessel function

In summary, the conversation is about finding the solution for the integral of Bessel functions with integer orders, where $a>0$ and $b>0$. The property of Bessel functions, as well as their orthonormality, are mentioned as possibly useful in finding the solution. Reference or solution from computer programs are also welcomed.
  • #1
zluo
1
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Is there somebody who knows the solution (closed form) for the integral
$$\int^\infty_0\frac{J^3_1(ax)J_0(bx)}{x^2}dx$$
where $a>0,b>0$ and $J(\cdot)$ the bessel function of the first kind with integer order?

Reference, or solution from computer programs all are welcome. Thanks!
 
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  • #2
zluo said:
Is there somebody who knows the solution (closed form) for the integral
$$\int^\infty_0\frac{J^3_1(ax)J_0(bx)}{x^2}dx$$
where $a>0,b>0$ and $J(\cdot)$ the bessel function of the first kind with integer order?

even if belatedly believe that this property of bessel funtions is useful
$$\frac{J_{n}(x)}{x}=\frac{J_{n-1}+J_{n+1}}{2n}$$
with the orthonormality of bessel functions
$$\int^\infty_0 J_{n}(ax)J_{n}(bx)xdx=\frac{1}{a}\delta(a-b)$$
$$\int^\infty_0\left(\frac{J_1(ax)}{x}\right)^{3}J_0(bx)xdx =\int^\infty_0\left(\frac{J_{1-1}+J_{1+1}}{2\cdot1}\right)^{3}J_0(bx)xdx=\dots$$
 

FAQ: An integral about Bessel function

What is a Bessel function?

A Bessel function is a type of special function that is used to solve differential equations in mathematical physics. It is named after the German mathematician Friedrich Bessel and is often denoted by the symbol J.

What is the significance of an integral about Bessel functions?

An integral about Bessel functions is used to calculate the area under the curve of a Bessel function. This can be useful in various mathematical and scientific applications, such as signal processing and heat transfer.

How is an integral about Bessel functions calculated?

The integral about Bessel functions can be evaluated using various methods, such as using the properties of Bessel functions, substitution, or integration by parts. It ultimately depends on the specific integral being solved.

What are the applications of Bessel functions in science?

Bessel functions have various applications in science, including physics, engineering, and mathematics. They are commonly used to describe phenomena with circular or cylindrical symmetry, such as electromagnetic fields or heat conduction.

Are there any real-world examples where Bessel functions are used?

Yes, Bessel functions have many real-world applications. They are used in fields such as acoustics, signal processing, and optics. For example, Bessel functions are used in the design of antennas and in the analysis of vibrations in musical instruments.

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