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Table 2 The number of iterations and norm of the corresponding residual for Example 4.1 with \( {\overline{V}}_1={\overline{W}}_1=\mathbf{0} \)

From: Iterative algorithm for the reflexive solutions of the generalized Sylvester matrix equation

Number of iterations k Norm of the corresponding residual R
26 2.9491 × 107
27 6.3498 × 107
28 2.5150 × 109
29 5.0896 × 1011
30 2.7365 × 1011