Unthrottling the Tanh Jacobian in SAC: A Negative Result on Bang-Bang Control and MetaDrive

arXiv:2609.09478 · cs.LG, cs.RO · Submitted 2026-09-08 · Read on arXiv

cs.LG, cs.RO

Submitted: 2026-09-08

Updated: 2026-09-08

Comments: 8 pages, 2 figures. Technical report. Negative result. Code: https://github.com/fshamass/Tanh-Bypass

Code: https://github.com/fshamass/Tanh-Bypass

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Actor — 3× in this paper · explained in 3 episodes
• Fine-Tuning — 1× in this paper · explained in 5 episodes
• Soft Actor-Critic — 1× in this paper
• Soft Actor-Critic (SAC) — 1× in this paper · explained in 2 episodes

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