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. 2010 Jan 29;6(1):e1000653. doi: 10.1371/journal.pcbi.1000653

Table 6. Comparison of linear Turing instability analysis with numerical integrations for the dispersive propagator.

Inline graphic Inline graphic Inline graphic & Inline graphic Inline graphic Inline graphic
1 50 22.33 8.04 0.21 linearization
23 8.38 0.14, 0.22 simulation
100 44.27 11.34 0.27 linearization
45 11.73 0.22, 0.28 simulation
3 50 7.23 4.54 0.15 linearization
8 4.82 0.09, 0.17 Inline graphic
100 14.43 6.41 0.20 linearization
14.5 6.92 0.18, 0.26 Inline graphic

For selected orders Inline graphic and conduction velocities Inline graphic linear Turing instability analyses of Eqns. (66)–(68) were used to predict the critical Turing-Hopf Inline graphic, Inline graphic, and Inline graphic, cf. Fig. 9. For numerical simulations, a Inline graphic somewhat larger than Inline graphic was chosen. The space-averaged 1D temporal Fourier spectrum Inline graphic was used to estimate Inline graphic as the maximum of Inline graphic. The time-averaged 2D spatial Fourier transform Inline graphic was used to obtain two estimates: Inline graphic as the Inline graphic for which Inline graphic is maximal; and Inline graphic as the Inline graphic for which the mean of Inline graphic over a circle around the origin with radius Inline graphic is maximal. For the estimates grid time series of 50 time units with Inline graphic (500 samples total) were recorded, after initial “transients” of 100 (Inline graphic) time units were discarded. The spatial grid was Inline graphic (Inline graphic) with discretization steps Inline graphic.