Is this a quadrisected mesh?

Gabriel Taubin. Is this a quadrisected mesh?. In Symposium on Solid Modeling and Applications. pages 261-266, 2001. [doi]

@inproceedings{Taubin01:0,
  title = {Is this a quadrisected mesh?},
  author = {Gabriel Taubin},
  year = {2001},
  doi = {10.1145/376957.376987},
  url = {http://doi.acm.org/10.1145/376957.376987},
  researchr = {https://researchr.org/publication/Taubin01%3A0},
  cites = {0},
  citedby = {0},
  pages = {261-266},
  booktitle = {Symposium on Solid Modeling and Applications},
}