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Table 2 Classification of \(r(x,t)\) surface at node points

From: Solutions of the fractional combined KdV–mKdV equation with collocation method using radial basis function and their geometrical obstructions

Node points N,N Class
x = 0 −1166.57 spacelike
x = 0.1 −233.172 spacelike
x = 0.2 −73.2727 spacelike
x = 0.3 −29.2972 spacelike
x = 0.4 −13.4868 spacelike
x = 0.5 −6.72612 spacelike
x = 0.6 −3.46118 spacelike
x = 0.7 −1.73585 spacelike
x = 0.8 −0.758654 spacelike
x = 0.9 −0.173935 spacelike
x  ≈ 0.94 0 lightlike
x = 1 0.191883 timelike