Advanced Analysis Library Only
double Bessel1st (double r, double x);
Computes the Bessel function Jr(x) of the first kind of fractional order r, which is defined as follows:
The Bessel function is a solution of the following differential equation:
For any integer value of order r, the function is defined for all real values of x. Otherwise, the function is defined for nonnegative real values of x.
Input | ||
Name | Type | Description |
r | double-precision | The order of the function. |
x | double-precision | The point at which the Bessel function is evaluated. |
Name | Type | Description |
result | double-precision | The value of the Bessel function evaluated at x. |