' - -  - File: XIIIj - - - X'{t} = F{t,x}

F{t,x} = t^2/2 - 2/3
                              
to = -2  : tf = 2  : xo = 2-2/3
IVP[F, {to, tf, xo}{1.05,0.001}]

' In the Walk Thru, the phase plane shown here, X'{t} vs X{t}, is verified by a simple
'   vector plot from the solution listed below (comment out IVP command above).

V<t> = <t^3/6 - 2*t/3 + 4/3, t^2/2 - 2/3, 0>

n = 100
Plot[V, {t, to, tf, n}]



