Two Variants of Noncontingency Operator

Jie Fan. Two Variants of Noncontingency Operator. Notre Dame Journal of Formal Logic, 62(3), 2021. [doi]

@article{Fan21-19,
  title = {Two Variants of Noncontingency Operator},
  author = {Jie Fan},
  year = {2021},
  doi = {10.1215/00294527-2021-0025},
  url = {https://doi.org/10.1215/00294527-2021-0025},
  researchr = {https://researchr.org/publication/Fan21-19},
  cites = {0},
  citedby = {0},
  journal = {Notre Dame Journal of Formal Logic},
  volume = {62},
  number = {3},
}