HEJ, HU ISSN 1418-7108 Manuscript no.: ANM-980724-A

Model problem 2, standard triangulation

The increasing iteration numbers of the second column of Table 7 (exact solvers $B_I = C_I = K_I$) confirm the growing spectral equivalence constants of the BPS preconditioner $C_C$ to $S_C$.

For the comparison of MG and FMG, and for different $\omega$, there hold exactly the same conclusions as for the corresponding model problem 1. Table 8 comprises the degrees of freedom and the computational time for $\omega = 1.5$.

 

Table: Model problem 2, standard triangulation, # cg iterations

 

Table: Model problem 2, standard triangulation, # cg iterations and time for $\omega=1.5$

HEJ, HU ISSN 1418-7108 Manuscript no.: ANM-980724-A