## 110 Reputation

8 years, 225 days
UNIVERSITY OF LAGOS, AKOKA YABA, LAGOS
LAGOS, Nigeria

## Error, invalid input: diff expects 2 or ...

Maple

Please, anyone with usefull informations to hint me. Looking forward to your favorable response.

## Copy from Maple 2016 to Ms Word...

Maple 2016

Good day everyone,

I am having challenges copying equations from Maple 2016 to word. Anyone with useful information should share please.

Thank you in anticipation for your kind gesture

## Error, (in dsolve/numeric/bvp) cannot de...

Maple

Can anyone help me with this problem. I am trying to solve it and its given me an error message "Error, (in dsolve/numeric/bvp) cannot determine a suitable initial profile, please specify an approximate initial solution".

 >
 >
 >
 >
 >
 >
 >
 >
 >
 >
 >
 >
 >
 (1)
 >
 >
 >

Looking forward to your favorable response.

Kind regard

## Solving and Plotting PDE...

Maple

Having difficulties solving pde. Below is the problem and its not plotting. Anyone with useful informations. Please

restart;
with(PDEtools, casesplit, declare);
with(DEtools, gensys);
with(Physics);

PDE := diff(theta(x, t), x, x)+beta*theta(x, t)*(diff(theta(x, t), x, x))+beta*((diff(theta(x, t), x))^2)-M^2*theta(x, t)-S[h]*(theta(x, t)^2)+M^2*G*(1+E*theta(x, t))-P[e]*(diff(theta(x, t), x)) = diff(theta(x, t), t);
/ d  / d             \\
|--- |--- theta(x, t)||
\ dx \ dx            //

/ d  / d             \\
+ beta theta(x, t) |--- |--- theta(x, t)||
\ dx \ dx            //

2
/ d             \     2                               2
+ beta |--- theta(x, t)|  - M  theta(x, t) - S[h] theta(x, t)
\ dx            /

2                              / d             \    d
+ M  G (1 + E theta(x, t)) - P[e] |--- theta(x, t)| = ---
\ dx            /    dt

theta(x, t)
BC := theta(x, 0) = 0, Dt(theta(0, t)) = 0, theta(1, t) = 1;
theta(x, 0) = 0, Dt(theta(0, t)) = 0, theta(1, t) = 1
Codes := [beta = .1, M = .1, S[h] = .1, G = .1, P[e] = .1, E = .1];
S1 := pdsolve({BC, subs(Codes, PDE)});
PDEplot(S1, [[t, theta(x, t)], [x, theta(x, t)]], t = 0 .. 1, x = 0 .. 1, iterations = 2, numchar = [10, 10], stepsize = 0.5e-1, numsteps = [-5, 5]);
PDEplot([[t, theta(x, t)], [x, theta(x, t)]], t = 0 .. 1,

x = 0 .. 1, iterations = 2, numchar = [10, 10],

stepsize = 0.05, numsteps = [-5, 5])

## Problem Plotting Stream Function...

Maple , MaplePrimes

Good day sirs,

I am trying to plot graphs on stream function but its given me a lot of multiple error using my codes. Anyone with useful information should please share.

Below is the code.

Thanks

Maple Worksheet - Error

Failed to load the worksheet /maplenet/convert/Test.mw .