statistical methods

https://mc-stan.org/
laplacian eigenmaps: Belkin, Mikhail, and Partha Niyogi. “Laplacian Eigenmaps and Spectral Techniques for Embedding and Clustering.” In Proceedings of the 14th International Conference on Neural Information Processing Systems: Natural and Synthetic, 585–91. NIPS’01. Cambridge, MA, USA: MIT Press, 2001.