Hierarchical Topic Modeling via Contrastive Learning and Hyperbolic Embedding Zhicheng Lin author HeGang Chen author Yuyin Lu author Yanghui Rao author Hao Xu author Hanjiang Lai author 2024-05 text Proceedings of the 2024 Joint International Conference on Computational Linguistics, Language Resources and Evaluation (LREC-COLING 2024) Nicoletta Calzolari editor Min-Yen Kan editor Veronique Hoste editor Alessandro Lenci editor Sakriani Sakti editor Nianwen Xue editor ELRA and ICCL Torino, Italia conference publication lin-etal-2024-hierarchical https://aclanthology.org/2024.lrec-main.712/ 2024-05 8133 8143