This is the error of a neuron in a feedforward neural network.
This is the error of a neuron in a feedforward neural network. It quantifies how much the neuron's potential contributed to the network's training loss. The error is computed in the backward pass in backpropagation.
This symbol, \(\delta\), is the error of a neuron in a feedforward neural network. It quantifies how much the neuron's potential contributed to the network's training loss. The error is computed in the backward pass in backpropagation, so it plays a role in computing the gradient when minimizing the loss function. The error is computed differently, depending on whether the neuron is a hidden neuron or an output neuron.