Update README.md

README.md

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-{}
+license: mit
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 The base Qwen2.5-Math-7B model used by LUFFY. 
 We change to rope_theta from 10000 to 40000 and extend the context window to 16k.
-Also, we modify the chat_template for the system prompt and add <think>. 
+Also, we modify the chat_template for the system prompt and add <think>. 
+
+# Citation
+If you find our model, data, or evaluation code useful, please kindly cite our paper:
+```bib
+@misc{luffy,
+      title={Learning to Reason under Off-Policy Guidance}, 
+      author={Jianhao Yan and Yafu Li and Zican Hu and Zhi Wang and Ganqu Cui and Xiaoye Qu and Yu Cheng and Yue Zhang},
+      year={2025},
+      eprint={2504.14945},
+      archivePrefix={arXiv},
+      primaryClass={cs.LG},
+      url={https://arxiv.org/abs/2504.14945}, 
+}
+```