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On the condition number theory of the equality constrained indefinite least squares problem
Shaoxin Wang, Hanyu Li, Hu Yang
In this paper, within a unified framework of the condition number theory we present the explicit expression of the projected condition number of the equality constrained indefinite…
On the penalized maximum likelihood estimation of high-dimensional approximate factor model
Shaoxin Wang, Hu Yang, Chaoli Yao
In this paper, we mainly focus on the penalized maximum likelihood estimation (MLE) of the high-dimensional approximate factor model. Since the current estimation procedure can not…
On the partial condition numbers for the indefinite least squares problem
Hanyu Li, Shaoxin Wang
The condition number of a linear function of the indefinite least squares solution is called the partial condition number for the indefinite least squares problem. In this paper, b…
Partial condition number for the equality constrained linear least squares problem
Hanyu Li, Shaoxin Wang
In this paper, the normwise condition number of a linear function of the equality constrained linear least squares solution called the partial condition number is considered. Its e…