Wei-Ning Chiu Chuan-Ju Wang Pu-Jen Cheng Token-Weighted Multi-Target Learning for Generative Recommenders with Curriculum Learning. 2026 January abs/2601.17787 CoRR https://doi.org/10.48550/arXiv.2601.17787 db/journals/corr/corr2601.html#abs-2601-17787 streams/journals/corr