@inproceedings{shing-tung2001geometry, title={Geometry of three manifolds and existence of black hole due to boundary effect}, author={Shing-Tung Yau}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224203849720103098}, booktitle={arXiv preprint math/0109053}, year={2001}, }