Fig. 4

The graphical representation of \(\Phi _{18}(x_{1},t)\) for Eq. (57) is presented. (a) 3D plot, (b) 2D plot, and (c) density plot, where \(\theta _{3}=1\), \(\theta _{2}=1\), \(m=2\), \(\theta _{1}=1\), \(\mu =1\), \(\lambda =1\), \(y=1\).