{ Fill in the following sections (removing comment marks ! if necessary), and delete those that are unused.} TITLE '' { the problem identification } COORDINATES cartesian1 { coordinate system, 1D,2D,3D, etc } VARIABLES { system variables } u select ! painted { make color-filled contour plots } ! NODELIMIT =100 errlim=1e-4 !ngrid=100 !regrid=off DEFINITIONS { parameter definitions } L = 20 eps = 0.1 INITIAL VALUES u = 1.5/cosh(x/2)^2 !u=u00 EQUATIONS { PDE's, one for each variable } u: dt(u)=dxx(u)-u+u^2/vol_integral(u^2)*6*(1+x^2*0.079) BOUNDARIES { The domain definition } region 1 start(-L) natural(u) = 0 line to (L) TIME 0 TO 100 monitors for time=1 by 1 to 100 elevation(u) from (-L) to (L) plots !for t = 0 by 1000 to 4000 ! transfer(u) file="y.dat" end