## 249 Reputation

15 years, 298 days

Maple

## specifying boundary conditions with mult...

Maple

I need to specify some boundary conditions and I am unsure how to write it. My conditions are

F[m,n](1)=1,F[m,n](-1)=-1 if m=n=0 else F[m,n](1)=F[m,n](-1)=0  and F'[m,n](1)=0 and F'[m,n](-1)=0 for all m and n

how do i specify this?

Thanks

## substitution?...

Maple

I have the differential equation below

de1:=diff(F(eta,alpha,R),eta\$4)+alpha*eta*diff(F(eta,alpha,R),eta\$3)+2*alpha*diff(F(eta,alpha,R),eta\$2)-R*(diff(F(eta,alpha,R),eta)*diff(F(eta,alpha,R),eta\$2)-F(eta,alpha,R)*diff(F(eta,alpha,R),eta\$3));

How do I evaluated it with a series representationtation of F like the one below

i tried using the subs command to substitute it in but just got back what i started with

thanks

## Problem with iterative process...

Maple

Maple

I have a polynomial in powers of R where a_n are coefficients

A=sum(a_n*R^n)

I am trying to write R in powers of A.

So if n=3 we have

AS:=sum(a[n]*R^n,n=1..3);

sol:=solve(series(AS,R,3)=A,R);

 1 2 3 4 Page 1 of 4
﻿