
1.4)  in 1D with the initial **data** Φ 0 (x) = (cos(x), cos(x)) T , electromagnetic potentials V (x) = 1/(1 + sin(x) 2 ) and A 1 (x) = (1 + sin(x))/(2 + cos(4x)). The same mesh size h = π/8 and time step τ = 10
