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  • The first option is that user does not provide anything. The EigenSolver container in the input file looks like:
    Code Block
      EigenSolver: {
        NumEigenvalues:     1
        FrequencyShift:             10.e9
        Tolerance: 1.e-8
      }
    
    In this case, Omega3P will use the default option for linear solver for solving shifted linear systems

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