How far is SLAM from a linear least squares problem?

Shoudong Huang, Yingwu Lai, Udo Frese, Gamini Dissanayake. How far is SLAM from a linear least squares problem?. In 2010 IEEE/RSJ International Conference on Intelligent Robots and Systems, October 18-22, 2010, Taipei, Taiwan. pages 3011-3016, IEEE, 2010. [doi]

@inproceedings{HuangLFD10,
  title = {How far is SLAM from a linear least squares problem?},
  author = {Shoudong Huang and Yingwu Lai and Udo Frese and Gamini Dissanayake},
  year = {2010},
  doi = {10.1109/IROS.2010.5652603},
  url = {http://dx.doi.org/10.1109/IROS.2010.5652603},
  researchr = {https://researchr.org/publication/HuangLFD10},
  cites = {0},
  citedby = {0},
  pages = {3011-3016},
  booktitle = {2010 IEEE/RSJ International Conference on Intelligent Robots and Systems, October 18-22, 2010, Taipei, Taiwan},
  publisher = {IEEE},
  isbn = {978-1-4244-6674-0},
}