Lambert W function
= Lambert W function
{wiki=Lambert_W_function}
The Lambert W function, often denoted as \\( W(x) \\), is a special function that is defined as the inverse of the function \\( f(W) = W e^W \\). In other words, if \\( W = W(x) \\), then: \\\[ x = W e^W \\\] This means that the Lambert W function gives solutions \\( W \\) for equation \\( x = W e^W \\) for various values of \\( x \\).