MaplePrimes - answers and comments on Question, cannot find the error

Use add, not sum

Joe Riel — Sat, 21 Jan 2012 11:22:53 Z

Change the ?sum to an ?add and remove the forward quotes.

Kitonum — Sat, 21 Jan 2012 13:55:03 Z

Here is corrected and simplified the code:

restart;

N := 2;

alias(epsilon = e, eta = t);

eq1 := 5*diff(F(t), t$3)+(1+3*e)*F(t)*diff(F(t), t$2)-(2+e)*diff(F(t), t)^2 = 0;

G :=unapply(add(F[i](t)*e^i, i = 0 .. N),t);

deqn := simplify(collect(subs(F(t)=G(t),eq1), e), {e^(N+1) = 0});

thermofluids — Sat, 21 Jan 2012 12:49:21 Z

It does not solve the problem.