Module i1f 

Functions

f_i1f

Modified Bessel of the first kind of order 1

i1f_asympt 🔒

Asymptotic expansion for I1.

i1f_small 🔒

Computes I1(x) = x/2 * (1 + 1 * (x/2)^2 + (x/2)^4 * P((x/2)^2))