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Jul 22, 2019 at 20:49 comment added Aksakal @J.G. "sigmoid" is a generic term for an S-curve, as far as I'm concerned, but you're right to point to a link between two specifications of a sigmoid
Jul 22, 2019 at 20:44 comment added J.G. It's worth noting the hyperbolic tangent is closely related to the sigmoid function, viz. $\sigma(x)=\frac12\left(1+\tanh\frac{x}{2}\right)$.
Jul 22, 2019 at 17:25 history answered Aksakal CC BY-SA 4.0