Table 4 Measured iteration numbers \(n_{CG}\) for the preconditioned CG method attained for the model problem (20) on the configuration depicted in Fig. 5 using a single element overlap
From: Multilevel preconditioners for embedded enriched partition of unity approximations
\(\varvec{k}\) | \({{\mathbf {{\small {\uppercase {Dof}}}}}}\) | \(\varvec{n_\mathrm {CGV(1,1)}}\) | \(\varvec{n_\mathrm {CGV(3,3)}}\) | \(\varvec{n_\mathrm {CGW(1,1)}}\) |
|---|---|---|---|---|
3 | 15,666 | 17 | 11 | 17 |
4 | 106,482 | 19 | 14 | 18 |
5 | 774,738 | 22 | 17 | 17 |
6 | 5,883,282 | 24 | 20 | 16 |