The Sigmoid and its Derivative
The simoid function, $\sigma(x)$, is also called the logistic function, or expit \textcite{wiki_logit}. It is the inverse of the logit function. It’s function definition is:\begin{equation}\sigma(x) = \frac{1}{(1+e^{-x})}%\tag{sigmoid function}\label{eqn:sigmoid}\end{equation} Let’s get […]


