A recurrent neural network is a form of neural network with a state/memory that runs on time series or sequential data. At each step a neura networ uses the current state and inout token to geerate the next state and to predict the next token. As the hidden state is not part of the training data, the training phase is more complex than for a simple neural network.
Defined on page 331
Used on pages 331, 332, 338
Also known as RNN