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most citedGPBiLQ and GPQMR: Two iterative methods for unsymmetric partitioned linear systems

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math.NA2025

GP-CMRH: An inner product free iterative method for block two-by-two nonsymmetric linear systems

Kui Du, Jia-Jun Fan

We propose an inner product free iterative method called GP-CMRH for solving block two-by-two nonsymmetric linear systems. GP-CMRH relies on a new simultaneous Hessenberg process t…