Expand description
The registered custom Backward node (autodiff op).
ยงCustom autodiff node for the Mamba-3 double-SSD recompute backward
Implements Mamba3DoubleSsdBackendExt
for Autodiff<B> via a single Burn [Backward] node. The forward keeps only
its leaf inputs; backprop replays the serial kernels and the gradient math in
[super::combined_backward], so the large intermediates are never retained.
The two outputs (y, final_state) are flattened into one tracked tensor
(via crate::utils::combined_grad) so one node covers both.