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    • Multipreconditioned GMRES for Shifted Systems 

      Bakhos T.; Kitanidis P.K.; Ladenheim S.; Saibaba A.K.; Szyld D. (SIAM Journal on Scientific Computing, 2017-01-01)
      An implementation of GMRES with multiple preconditioners (MPGMRES) is proposed for solving shifted linear systems with shift-and-invert preconditioners. With this type of preconditioner, the Krylov subspace can be built ...