Matlab functions for the zeros of:
- Cylinder functions (Linear combinations of Bessel functions), and their derivatives
- Bessel function cross-products
Functions are fast (1e5 of roots per second on modern pc) and accurate (typically relative error of 1e-16).
Derivation an proofs can be found in:
Horsley, D.E. Numer. Math. (2017) 136: 679. https://doi.org/10.1007/s00211-016-0853-7