Author

Bongseok Kim

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Preprint Aug 2026

FAST-DeepONet: Factor-Augmented Branch Representations for High-Dimensional PDE Inputs in the Small-Sample Regime

FAST-DeepONet, a branch representation combining a fixed spectral path with a regularized projection of the orthogonal residual, in which the directional penalty acts on the effective residual map after each of its rows is normalized, is introduced.

J. Kwon, Bongseok Kim, Guang Lin · 0 citations