ATHENA: Mathematical Reasoning with Thought Expansion Jb. Kim author Hazel Kim author Joonghyuk Hahn author Yo-Sub Han author 2023-12 text Proceedings of the 2023 Conference on Empirical Methods in Natural Language Processing Houda Bouamor editor Juan Pino editor Kalika Bali editor Association for Computational Linguistics Singapore conference publication kim-etal-2023-athena 10.18653/v1/2023.emnlp-main.1014 https://aclanthology.org/2023.emnlp-main.1014/ 2023-12 16315 16327