Author

Mingjia Yin

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Preprint Aug 2026

Rethinking Item Tokenization in Generative Recommenders: From Fixed Atoms to Semantic Subwords

Semantic Subword Tokenization (SST) is proposed, which represents historical items as variable-length semantic subwords while preserving fixed-length target decoding and introduces Behavior-induced Co-occurrence Augmentation to inject coarse-grained semantic prefix transition signals.

Xin-Rui Miao, Mingjia Yin, Jiaqing Zhang et al. · 0 citations