//! Internal Bessel-function approximations used by Excel engineering builtins.
//!
//! The J/Y implementations are Rust ports of the Sun/openlibm algorithms; the original
//! permissive notice is preserved in the source files. The I/K implementations follow
//! Numerical Recipes-style polynomial/recurrence approximations.
pub use bessel_i;
pub use jn as bessel_j;
pub use yn as bessel_y;
pub use bessel_k;