## 249 Reputation

15 years, 224 days

## solving a third order ode with series...

Maple

I have a similar problem to before
I have rewritten a fourth order ODE as a third order ODE with a constant of integration, K. I need to rewrite K as a series K=K0+R*K1+R2*K2+… up to nmax. Then I need to solve by comparing coefficients of powers of R. I have four boundary conditions which are clear from the program below and I keep substituting back into the equation to get a more accurate solution:

## maple to pdf...

Maple

how do i convert/import a maple spreadsheet to a pdf file?

## inputting into a table...

Maple

i have an equation which is something like

F''(1)=a0+R*a1+R^2*a2+R^3*a3+...R^n*an

I need to write the coefficients an in a table against the power of R

so something like

n        an

0        ....

1       ....

2       ....

my table should go up to n=15

thanks

mj

## problem with large calculation...

Maple

I have a problem with my calculations. I have changed the Order to 15. If I go any higher than this I get the error message:

"Error, invalid input: rhs expects 1 argument, but received 0"

after the loop. I need to calculate more terms. Does anyone know why this is happening and how I can fix it?