And so with this provocative title, "pushing dsolve to its limits" I want to share some difficulties I've been having in doing just that. I'm looking at a dynamic system of 3 ODEs. The system has a continuum of stationary points along a line. For each point on the line, there exist a stable (center) manifold, also a line, such that the point may be approached from both directions. However, simulating the converging trajectory has proven difficult.

I have simulated as...

hi

I want to have a fprint command which should given me the data in two columns.

I want to modifiy the following command

fprintf(fd,"%f \n",li,sigmai);

this command gives me data in horizental form, i.e.,

0.001000 0.300990 0.600980 0.900970 1.200960 1.500950 1.800940  2.100930

But i want it in the follwoing form

 li              sigma

0.001000 0.300990

 0.600980 0.900970

I am on maple 12 and this is not working.

My programming skills are very limitied but now that I see roughly how to do this (thanks to everyone on here) I can try and tweak it in roder to make it work.

As for the sequence...it isnt as nice as it looks, the pattern doesnt continue.

Is there a command to change differential equation into difference equation?

i set up maple 14 on win 7 64 bit,  maple 14  opens but codes don't  work. how can i solve this problem? 

I am interested to know how the find the maximum value in a function of f(x,t) over an interval {x=a..b, t=c..d}. I have searched this forum and the web and can not find anything to do it.

I have plotted the function and can visually see the maximum, however, although I have tried many methods I can not calculate the maximum value.

Any assistance would be appreciated. If possible, I would also like to calculate the mean and minimum value for the function.

Hello All,

How may I have Maple accept and output J, rather than I, for imaginary numbers?

Thanks,

Dave

Hello All,

Are there keyboard shortcuts for pi and e? It's quite inconvenient to pull these from "Common Symbols". Thanks!

Regards,

Dave

When an existing .mw file is opened in Maple 15 (i.e. by double clicking the file in Windows Explorer), a new document is always opened automatically alongside the existing file, and a "Startup" dialog pops up asking the user to select "Document" or "Worksheet" mode. I think this is annoying because each time the user needs to close the dialog to get to his/her .mw file.

This behavior did not occur in Maple 14 and I don't understand the reason for this change. Can we go back to the previous behavior?

For the following system:

x1 := M*(cos(phi)-a*cos(phi)) / (1-b*cos(2*phi))

x2 := M*(cos(phi)+a*sin(phi)) / (1+b*sin(2*phi))

y1 := M*(sin(phi)+a*sin(phi)) / (1-b*cos(2*phi))

y2 := M*(sin(phi)+a*cos(phi))/ (1+b*sin(2*phi))

I'm solving for M(x1,x2,y1,y2), eliminating a, b, and phi. 

I've tried

solve({x1=X1, x2=X2, y1=Y1, y2=Y2},{M,a,b,phi},AllSolutions);

and

sol := eliminate({x1 = X1, x2 = X2, y1 = Y1, y2 = Y2}, {M, a, b, phi});

int(int(int(max(x^2,y^2,z^2),x=-1..1),y=-1..1),z=-1..1) with Maple?  The same question in higher dimensions.

Hi, I am running Maple 12 and this might be a simple question but I couldnt find any guidence in the help section.

Basically I am trying to write a program to attack the ORYX cipher. Part of this needs access to what is essentially a permutation of the numbers 0-255.

How might I go about defining this permutation so that later I may get it to act on any such number?

All I can find in the help section is a command to find the orbit of a specific...

Hello

I have some numerical values (excel-format) and i would like import them in my Maple page , after that i m traying to plot them but it s impossible , in fact when i click on the right button of my mouse , i haven't this option.

Please help me , and show me how i should do it in details , i m not an expert

thanks .

Firas