@inproceedings{bae-etal-2026-online, title = "Online Difficulty Filtering for Reasoning Oriented Reinforcement Learning", author = "Bae, Sanghwan and Hong, Jiwoo and Lee, Min Young and Kim, Hanbyul and Nam, Jeongyeon and Kwak, Donghyun", editor = "Demberg, Vera and Inui, Kentaro and Marquez, Llu{\'i}s", booktitle = "Proceedings of the 19th Conference of the {E}uropean Chapter of the {A}ssociation for {C}omputational {L}inguistics (Volume 1: Long Papers)", month = mar, year = "2026", address = "Rabat, Morocco", publisher = "Association for Computational Linguistics", url = "https://preview.aclanthology.org/ingest-eacl/2026.eacl-long.30/", pages = "700--719", ISBN = "979-8-89176-380-7" }