@article{efficientinversefreealgorithmsforextreme,
  title = {Efficient Inverse-Free Algorithms for Extreme Learning Machine Based on the Recursive Matrix Inverse and the Inverse LDL' Factorization},
  author = {Hufei Zhu and Chenghao Wei},
  year = {2019},
  eprint = {1911.04856},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/1911.04856v1},
}