A single auxiliary space framework yields exact error-propagation and condition-number identities for iterative methods on semidefinite systems, unifying and generalizing prior SPD and semidefinite analyses.
Cao , On the convergence of general stationary linear iterative methods for singular linear systems , SIAM J
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Auxiliary space theory for the analysis of iterative methods for semidefinite linear systems
A single auxiliary space framework yields exact error-propagation and condition-number identities for iterative methods on semidefinite systems, unifying and generalizing prior SPD and semidefinite analyses.