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Table 5 Numbers of GCR iterations to convergence on large problems

From: Newton–Raphson preconditioner for Krylov type solvers on GPU devices

  DIAG SSOR BFGS–DIAG BFGS–SSOR
m = 3 m = 5 m = 7 m = 10 m = 3 m = 5 m = 7 m = 10
\(25^3\) 153 43 104 106 136 153 43 48 48 48
\(50^3\) 716 155 309 296 308 480 79 90 116 148
\(100^3\) 2557 467 653 680 716 754 224 220 216 265
  1. In the table, m denotes the number of previous iterations to be taken into consideration