@article{kernelsubspaceandfeatureextraction,
  title = {Kernel Subspace and Feature Extraction},
  author = {Xiangxiang Xu and Lizhong Zheng},
  year = {2023},
  eprint = {2301.01410},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2301.01410v2},
}