352174.fig.009a
(a)
352174.fig.009b
(b)
Figure 9: Condition number of 𝐐 depending on 𝛽 7 and 𝛽 1 9 . (a) Grid spacing ℎ = 1 / 1 0 ; (b) Grid spacing ℎ = 1 / 2 0 .