Large-degree asymptotic expansions for the Jacobi and related functions

Simple asymptotic expansions for the Jacobi functions $P_ν^{(α, β)}(z)$ and $Q_ν^{(α, β)}(z)$ for large degree $ν$, with fixed parameters $α$ and $β$, are surprisingly rare in the literature, with only a few special cases covered. This paper addresses this notable gap by deriving simple (inverse) fa