sigmoid
$$\varphi(z) = \frac{1}{1+e^{-z}}$$
has a convenient derivative of:
$$\frac{\delta \varphi}{\delta z} = \varphi (z) (1-\varphi(z))$$
also called the standard logistic function
$$\varphi(z) = \frac{1}{1+e^{-z}}$$
has a convenient derivative of:
$$\frac{\delta \varphi}{\delta z} = \varphi (z) (1-\varphi(z))$$
also called the standard logistic function
I live and work on the land of the Wurundjeri people of the Kulin Nation. I pay respect to their elders past and present and acknowledge that sovereignty was never ceded. Always was, always will be Aboriginal land.
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