Maximum Likelihood Estimation for Matrix Normal Models via Quiver Representations
Maximum Likelihood Estimation for Matrix Normal Models via Quiver Representations
复制标题
通过 Quiver 表示的矩阵正态模型的最大似然估计
DOI:
10.1137/20m1369348
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发表时间:
2021
影响因子:
1.2
通讯作者:
Makam, Visu
中科院分区:
文献类型:
--
作者:
Derksen, Harm;Makam, Visu
We study the log-likelihood function and maximum likelihood estimate (MLE) for the matrix normal model for both real and complex models. We describe the exact number of samples needed to achieve (almost surely) three conditions, namely a bounded log-likelihood function, existence of MLEs, and uniqueness of MLEs. As a consequence, we observe that almost sure boundedness of the log-likelihood function guarantees almost sure existence of an MLE, thereby proving a conjecture of Drton, Kuriki, and Hoff [Existence and Uniqueness of the Kronecker Covariance MLE, preprint, arXiv:2003.06024, 2020]. The main tools we use are from the theory of quiver representations, in particular, results of Kac, King, and Schofield on canonical decomposition and stability.
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