Sigmoid Function: Sigmoid means 'S' like , widely used in Neural Networks as the ACTIVATION function

Here are some video links to the sigmoid function:

1. V1 What is a Sigmoid Function?
2. V2: Which Activation Function to use
3. V3 : Bias in ANN
4. V4 : Backpropagation The algo used in all multi-layer Neural Networks
5. V5: Backpropagatiion algo once agian