Closed Boundary Learning for Classification Tasks with the Universum Class Hanzhang Zhou author Zijian Feng author Kezhi Mao author 2023-12 text Findings of the Association for Computational Linguistics: EMNLP 2023 Houda Bouamor editor Juan Pino editor Kalika Bali editor Association for Computational Linguistics Singapore conference publication zhou-etal-2023-closed 10.18653/v1/2023.findings-emnlp.1038 https://aclanthology.org/2023.findings-emnlp.1038/ 2023-12 15522 15536