Author

Frederik Diederichs

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Preprint Aug 2026

Rethinking Expressivity and Efficiency in Test-Time Training

Under the standard approximation of taking gradients at the chunk-start weights, a closed-form state transition is derived that exactly reproduces the chunk-end fast-weight and momentum states of the per-token recurrence of Test-Time Training.

Zeyun Zhong, Joya Chen, Manuel Martín et al. · 1 citation