ig_gen: Generating Function for the IG Copula Family
In vincenzocoia/copsupp: Vine Copulas made easy

ig_gen is the function itself, and ig_geninv is its inverse; ig_D1gen is the first-argument derivative.

ig_gen(t, eta, k)

ig_D1gen(t, eta, k)

ig_geninv(p, eta, k, mxiter = 40, eps = 1e-12, bd = 5)

`t`	Vector of values >=1 to evaluate the function at.
`eta`	Value of second argument of H_k, >0. This is allowed to be a vector, except in `ig_geninv()`.
`k`	Single numeric >1 corresponding to the `k` parameter of the function.
`w`	Vector of values in [0,1] to evaluate the inverse function at.