@article{gaussianprocessontheproductof,
  title = {Gaussian Process on the Product of Directional Manifolds},
  author = {Ziyu Cao and Kailai Li},
  year = {2023},
  eprint = {2303.06799},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2303.06799v3},
}