i follow

http://www.maplesoft.com/applications/view.aspx?SID=4706

and edit existing code to solve a equation and got some questions and error, How to solve pde with finite difference in maple?

r := 0.03;
K := 20;
Smax := 20;
T := 1;
ex1 := diff(y(x,t), t) + r*x*diff(y(x,t), x) + 1/2*sigma^2*x^2*diff(y(x,t), x$2) + x*diff(y(x,t), x)*diff(y(x,t), t) = r*y(x,t);

bc1 := y(0,0)=K*exp(-r), y(Smax,0)=0;
a := 0;
b := 1;
N := 10;

Does anyone know how to control the placement of the directional arrows for a digraph?

Here's an example:

with(GraphTheory):

G := Digraph(Trail(4,2,1,3,4,5),Trail(6,8,9,7,6,5));

SetVertexPositions(G,[[0,1],[1,1],[0,0],[1,0],[2,0],[3,0],[4,0],[3,1],[4,1]]);

DrawGraph(G);

produces:

The...

 Hello,

I am trying to use a worksheet developed by Professor Batista [ritz06.mws] for calculating plate vibration frequencies using the Ritz method, which is available from the Applications directory - Mechanical Engineering folder.  The worksheet was developed using Maple 12 and I am using Maple 11; a careful reading of the file didn't show any commands that were incompatible across the two versions and yet I am not able to solve the worksheet using the default inputs provided in the worksheet.  I have attached a PDF output of the file with the error message.  Any assistance that could be offered would be greatly appreciated.

Please send your response to wayne.bell@fpl.com.

Kind regards,

Symbolic_integral.mw

Thanks in advance

K, im on this question right now:

Show that dV/dt = -k * V^(2/3) given that k = 0.4836 and t is measured in minutes if the original volume of the capsule is 300 ml, how long will it take the capsule to lose half its volume?

Im doing this on maple right now and see you if guys can spot my problem or my syntax:

1. eq1 := diff(y(t), t) = -k*y(t)^(2/3)

2. dsolve(eq1, y(t)) which gives me an equation

3. dsolve({eq1, y(0) = 300}, y(t...

How do I plot the numeric solution for both x(t) and y(t) on one graph to the differential system:

x'(t) = 2*x(t)-x(t)*y(t),   y'(t) = -y(t) + 0.4*x(t)*y(t)

x(0) = 5 and y(0) = 1

Thanks

To the Ineffable All,

     I don't understand what MapToBasis is doing to get the results shown in the example program.  Specifically, why are the x-y components interchanged and a sign added?  It seems to plot OK, but the components of the vector appear wrong to me. 

Ratch

VectorCalculus.mw

Maple animation movie "car with square wheels" moving in a straight direction?

Hi,

I have created a matrix of 101 rows and 93 coloumns and then populated the matrix via various loops. The values in the matrix are the values of a specific parameter G which varies with k and e. The rows represent values of G with constant values of parameter k while the coloumns represent constant values of parameter e. So if you imagine the matrix being a table one side represents values of e and the other side...

How can I use Maple to determine Ker θ for θ, n, and k when n = 6 and k = 5.

Hi,

I've been using Maple 13 installed on Ubuntu 10.10, but noticed some issues with 3d plots, Maple does not allow me to rotate and drag around 3d plots as it does on my windows 7 boot on the same machine, instead it struggles to even do the 3d plot in the first place and then usually crashes on trying to rotate it.

Also I occassionally get empty GUI boxes when I go to save as etc, instead of any content just a gray pop up box.

Anyone...

Hi,

I'm trying to enter a statement on more than one line, but have done so without success. When I press Shift+Enter, Maple adds a new blank line without the command prompt ">".

Any ideas of what I'm doing wrong?

Thanks in advance,

Carlos Mallen

When I run the following Maple codes, for some reason I get an error:

> restart:with(DEtools):with(plots):

> ode:= diff(p(t), t) = r*(1.5-sin(2*t))*p(t);

> odePlot := DEplot(ode, P(t), t = -3 .. 3, P = 0 .. 1000);

Error, (in DEtools/DEplot/CheckDE) derivatives must be given explicitly

I'm not sure what it's talking about? I feel like I've done things like this many times in the past. Any help...

Friends,

I am very beginner of Maple softs, in order to proceed with my project i need to model a simple Human Knee joint and  to do its simulation, Somebody please help on this, otherwise i cant able to proceed with my project.

Waiting for a solution

Vinil