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Weight Feedback Computes the Jacobian Transpose Locally in Modern Deep Networks

arXiv cs.LG ↗ · 2026-07-16 Cached

本文证明现代深度网络中预测编码(PC)使用的Jacobian转置乘积可以分解为局部可用的项,从而消除了自动求导反向传播的需要。提出的WF-Act-PC方法在CIFAR-10/100和Tiny-ImageNet上匹配甚至超越经过调优的反向传播基线,且性能随深度增加而提升。

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#bio-plausible

Backprop-free Pong: PC + distributional Hebbian plasticity vs. PPO: 57% vs. 59%, ~1500 lines from scratch [P]

Reddit r/MachineLearning ↗ · 2026-05-19

Explores how close a biologically plausible Hebbian agent can get to PPO on Pong, finding only a 2% gap but identifying catastrophic forgetting under self-play as a key bottleneck.

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