# GetMultipoleBesselIntegral

GetMultipoleBesselIntegral(q,k,f1,f2,n) calculates $\int f_1(r)j_k(qr)f_2(r)\mathrm{d}r$, where $j_k(qr)$ is a spherical Bessel function. The functions f1 and f2 are interpolating functions and the domain of the integral is the domain of interpolating function f1. It uses Gaussian quadrature of order n for each interval between the knots of the interpolating function f1.

## Input

• q : real
• k : integer
• f1: InterpolatingFunction
• f2: InterpolatingFunction
• n : unsigned int - optional, default is 3, maximum is 7

• real

## Example

description text

### Input

Example.Quanty
-- some example code

### Result

text produced as output