Figure 9From: Nonstandard finite difference variational integrators for nonlinear Schrödinger equation with variable coefficients Norm k 2 of the implicit Euler method (17) and the NSFD variational integrator (14). Norm k 2 of the implicit Euler method (17) and the NSFD variational integrator (14) for the NLSE with variable coefficients (16) (μ=1). Δt=0.1 and Δx=0.1.Back to article page