lambert_w( [ n , ] z )

The Lambert W function of z in SageMath. Defined implicitly by

\[ z = W(z) e^{ W(z)} \]

The optional argument n specifies the branch. Defaults to the principle branch n = 0 if omitted.

Plot on the real axis:

Series expansion about the origin:

Special values:

Related functions:   exp

Function category: logarithmic functions sagemath-docs