A shift splitting concept is introduced and, correspondingly, a shift-splitting iteration scheme and a shift-splitting preconditioner are presented, for solving the large sparse system of linear ...

Positive definite matrices play a central role in mathematics, physics, statistics and engineering due to their unique properties and widespread applicability. These matrices, which are characterised ...

The probability (Q) that the estimated between-group covariance matrix is not positive definite is computed for the balanced single classification multivariate analysis of variance with random effects ...