Hierarchical Semantic RL: Tackling the Problem of Dynamic Action Space for RL-based Recommendations.

@inproceedings{wang-2026-hierarchical, author = {Minmao Wang and Xingchen Liu and Shijie Yi and Likang Wu and Hongke Zhao and Fei Pan and Qingpeng Cai and Peng Jiang}, editor = {Hakim Hacid and Yoelle Maarek and Francesco Bonchi and Ido Guy and Emine Yilmaz}, title = {{Hierarchical Semantic RL: Tackling the Problem of Dynamic Action Space for RL-based Recommendations}}, booktitle = {{Proceedings of the ACM Web Conference 2026, WWW 2026, Dubai, United Arab Emirates, originally scheduled for April 13-17, 2026, rescheduled for June 29 - July 3, 2026}}, pages = {7857--7868}, publisher = {ACM}, year = {2026}, url = {https://doi.org/10.1145/3774904.3792843}, doi = {https://doi.org/10.1145/3774904.3792843} }