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Source code for paper "Hyperbolic Graph Attention Network"

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# Hyperbolic Graph Attention Network
The code containing a TensorFlow implementation of Hyperbolic Graph Attentation Networks (HAT): 
[https://ieeexplore.ieee.org/abstract/document/9435103](https://ieeexplore.ieee.org/abstract/document/9435103).
The code is built upon GAT (https://arxiv.org/abs/1710.10903)

## Overview
The repository is organised as follows:
- `data/` contains the dataset files;
- `models/` contains the implementation of the HAT (`sp_hgat.py`);
- `utils/` contains:
    * an implementation of an attention head, along with an experimental sparse version (`hlayers.py`);
    * preprocessing subroutines (`process.py`);

Finally, `hat.py` puts all of the above together and may be used to execute a full training run on Cora.

## Dependencies

The script has been tested running under Python 3.7, with the following packages installed:

- `numpy`
- `scipy`
- `networkx`
- `tensorflow-gpu==1.14.0`

## Reference
If you make advantage of the HAT model in your research, please cite the following in your manuscript:

```
@article{zhang2021hyperbolic,
  title={Hyperbolic graph attention network},
  author={Zhang, Yiding and Wang, Xiao and Shi, Chuan and Jiang, Xunqiang and Ye, Yanfang Fanny},
  journal={IEEE Transactions on Big Data},
  year={2021},
  publisher={IEEE}
}
```

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