Update README.md

README.md

@@ -31,4 +31,7 @@ python main.py --model polyatomic --rep polyatomic --dataset esol
   year      = {2025},
   note      = {Poster presentation}
 }
-```
+```
+
+### arXiv:
+[Topological Feature Compression for Molecular Graph Neural Networks](https://arxiv.org/abs/2508.07807)