3.15 Special functions

R lambert_w0(T x)

Implementation of the \(W_0\) branch of the Lambert W function, i.e., solution to the function \(W_0(x) \exp^{ W_0(x)} = x\)

R lambert_wm1(T x)
Implementation of the \(W_{-1}\) branch of the Lambert W function, i.e., solution to the function \(W_{-1}(x) \exp^{W_{-1}(x)} = x\)