@inproceedings{feragen:colt:2016,
  author = {Feragen, Aasa and Hauberg, S{\o}ren},
  title = {Open Problem: Kernel methods on manifolds and metric spaces. What is the probability of a positive definite geodesic exponential kernel?},
  booktitle = {29th Annual Conference on Learning Theory},
  series = {Journal of Machine Learning Research W\&CP},
  volume = {49},
  year = {2016},
  pages = {1647--1650},
}