# Sigmoid function Calculator

## Calculates the sigmoid function sa(x).

 The sigmoid function is used in the activation function of the neural network.
 a(gain) x 6digit10digit14digit18digit22digit26digit30digit34digit38digit42digit46digit50digit
 $\normal Sigmoid\ function\ \varsigma_{\alpha}(x)\\[10]\varsigma_{\alpha}(x) = \large \frac{1}{1+e^{-\alpha x}} = \large \frac {\tanh(\alpha x /2) + 1}{2}\\[15]\normal \varsigma '_{\alpha}(x) = \alpha \varsigma_{\alpha}(x) \{ 1 - \varsigma_{\alpha}(x) \} \\[15]\normal \varsigma ''_{\alpha}(x) = \alpha^{2} \varsigma_{\alpha}(x) \{ 1- \varsigma_{\alpha}(x) \} \{ 1 - 2 \varsigma_{\alpha}(x) \} \\[15]$
Sigmoid function
 [1-6] /6 Disp-Num5103050100200
[1]  2018/12/06 13:12   Female / 20 years old level / High-school/ University/ Grad student / Very /
Purpose of use
to understood artificial intelligent
[2]  2018/08/29 14:45   - / 40 years old level / A teacher / A researcher / Useful /
Purpose of use
Obtain sigmoid of a number
[3]  2018/08/04 04:32   Male / 40 years old level / Self-employed people / Useful /
Purpose of use
Learning Neural networks. Simulating activation functions to better understand its behaviour.
[4]  2018/07/04 00:24   Male / 20 years old level / An engineer / Very /
Purpose of use
Testing neural network activation functions
[5]  2018/05/13 21:38   Male / 30 years old level / An engineer / Useful /
Purpose of use
learn
Comment/Request
awesome,but need to explain some realtime example use as i am new
[6]  2018/04/04 17:47   Female / 20 years old level / A teacher / A researcher / A little /
Purpose of use
Calculate the sigmoid of a particular number

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