For the large sparse block two-by-two real nonsingular matrices, we establish a general framework of practical and efficient structured preconditioners through matrix transformation and matrix ...
Restoring Definiteness via Shrinking, with an Application to Correlation Matrices with a Fixed Block
This is a preview. Log in through your library . Abstract Indefinite approximations of positive semidefinite matrices arise in various data analysis applications involving covariance matrices and ...
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