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stat.ML2021
Learning Bayesian Networks through Birkhoff Polytope: A Relaxation Method
Aramayis Dallakyan, Mohsen Pourahmadi
We establish a novel framework for learning a directed acyclic graph (DAG) when data are generated from a Gaussian, linear structural equation model. It consists of two parts: (1)…
stat.ML2020★ 2 cited
Fused-Lasso Regularized Cholesky Factors of Large Nonstationary Covariance Matrices of Longitudinal Data
Aramayis Dallakyan, Mohsen Pourahmadi
Smoothness of the subdiagonals of the Cholesky factor of large covariance matrices is closely related to the degrees of nonstationarity of autoregressive models for time series and…