A way to train sequence models by unrolling time and sending errors backward.
BPTT is like replaying a messy group chat after a blowup. The last emoji gets blamed, but the drama started ten messages ago.
It trains AI for ordered data, like text or speech. It traces a later mistake back to earlier steps.
Backpropagation
BPTT is Backpropagation extended across time steps.
Sequence Modeling
Sequence Modeling uses BPTT to send later errors back to earlier steps.
LSTM
LSTM networks often use BPTT during training.
autodiff
Autodiff often handles the gradient math for BPTT.