Research Article

New Preconditioners with Two Variable Relaxation Parameters for the Discretized Time-Harmonic Maxwell Equations in Mixed Form

Figure 6

The eigenvalue distribution of the preconditioned matrix 1 𝑘 , 𝜂 , 𝜀 𝒜 with 𝑘 2 = 0 , 𝜂 = 0 . 0 1 and 𝑚 + 𝑛 = 9 6 1 .
617390.fig.006