Update README.md

README.md

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 # Model Card for RLFR-Qwen2.5-Math-7B
 
-[GitHub](https://github.com/Jinghaoleven/RLFR) | [Paper](https://arxiv.org) | [WebPage](https://jinghaoleven.github.io/RLFR/)
+[GitHub](https://github.com/Jinghaoleven/RLFR) | [Paper](https://arxiv.org/pdf/2510.10201) | [WebPage](https://jinghaoleven.github.io/RLFR/)
 
 **RLFR-Qwen2.5-Math-7B** is trained from Qwen2.5-Math-7B with the [RLFR](https://github.com/Jinghaoleven/RLFR) framework, which introduces the flow reward derived from latent space, extending RLVR with latent reward utilization.