besselj

besselj, a C code which evaluates Bessel J functions of noninteger order.

Licensing:

The information on this web page is distributed under the MIT license.

Languages:

besselj is available in a C version and a C++ version and a Fortran90 version and a MATLAB version and an Octave version and a Python version.

Related Data and Programs:

besselj_test

fn, a C code which approximates elementary and special functions using Chebyshev polynomials; functions include Airy, Bessel I, J, K and Y, beta, confluent hypergeometric, error, gamma, log gamma, Pochhammer, Spence; integrals include hyperbolic cosine, cosine, Dawson, exponential, logarithmic, hyperbolic sine, sine; by Wayne Fullerton.

polpak, a C code which evaluates certain mathematical functions, especially some recursive polynomial families.

test_values, a C code which stores values of many mathematical functions, and can be used for testing.

Reference:

1. Donald Amos, SL Daniel, MK Weston,
   CDC 6600 subroutines IBESS and JBESS for Bessel functions I(NU,X) and J(NU,X),
   ACM Transactions on Mathematical Software,
   Volume 3, Number 1, March 1977, pages 76-92.
2. William Cody,
   Algorithm 715: SPECFUN - A Portable Fortran Package of Special Function Routines and Test Drivers,
   ACM Transactions on Mathematical Software,
   Volume 19, Number 1, March 1993, pages 22-32.

Source Code:

• besselj.c, the source code.
• besselj.sh, compiles the source code.
• besselj.h, the source code.