@inproceedings{dan20154d, title={4d N= 2 SCFT and singularity theory Part I: Classification}, author={Dan Xie, and Shing-Tung Yau}, url={http://archive.ymsc.tsinghua.edu.cn/pacm_paperurl/20191224204036572777122}, booktitle={arXiv preprint arXiv:1510.01324}, year={2015}, }