A simple question:
I have this equation:
eq1=Derivative[0, 1][T1][x, t] - Derivative[1, 0][T0][x, t]^2 -
T0[x, t]*Derivative[2, 0][T0][x, t] - Derivative[2, 0][T1][x, t] == 0;
I want only to select terms that contain T0 or its derivatives only, that is:
-Derivative[1, 0][T0][x, t]^2 - T0[x, t]*Derivative[2, 0][T0][x, t]
Thanks in anticipation.
DeleteCases[eq1 /. Equal -> Subtract, _?(FreeQ[#,T0]&]
? $\endgroup$ – Michael E2 Jan 15 '20 at 22:59