Hi

I used maple to solve a 4th order ode:

ode:=(h2(x)*diff(eta1IItrans(x),x$4)+diff(h2(x),x)*diff(eta1IItrans(x),x$3)+(1/(g1*h1))*((w^2)*(h1+h2(x))*diff(eta1IItrans(x),x$2)+(w^2)*diff(h2(x),x)*diff(eta1IItrans(x),x)+(w^4/g)*eta1IItrans(x))=0);

avec h2:=x->h2I*exp(d*x):

I have 2 questions:

-I can get a solution only with precise values of parameters (g, h, d etc...) but I would like a literal one.

And again, I've got a problem with drawing graphs with DrawGraph. I've generated some scale-free networks with Barabasi's algorithm (not implemented in Maple 12. I did that myself).
Now, I wanted to display these graphs in a nice way, in which you can clearly distinguish the hubs from the other nodes. I thought that the "style=spring" command would do so, but it puts nodes very near to each other, sometimes even overlapping.
Is there another solution to draw such a scale-free network in a nice way?
Thanks for helping.

I would like to investigate the JCHelpCallBack example using OpenMaple. The sample can be found under the directory,

$MAPLE/samples/OpenMaple/Java/jcmaple/

I've set LD_LIBRARY_PATH. And I can compile and run the jcmaple.java sample. That starts up what appears to be a commandline Maple session. And within that session I can issue the help query ?int OK. I can also issue INTERFACE_HELP(display,topic=int) and that too works, although it dispays as double-lined.

Does the following error message mean that the only way to remove RealDomain is to exit Maple & then start a new session?

 unwith(RealDomain):

hi and thanks for your comment, is it possible to establish some dir as default currentdir (independently of how maple is started)?. How can I know which maple procedures will use currentdir as default directory? Perhaps all of them? If not, what about the others? what does "home directory" mean in maple context? thanks again

Hi all,

Here is a description to the gamma density function:

http://en.wikipedia.org/wiki/Gamma_distribution

Basically, I am studying how to numerically integrate against the
gamma density function for kappa < 1.

As you can see, the key difficulty for the kappa < 1 case is that in
the integrand there is a term

x^(kappa-1)

and we have to integrate starting from x=0 all the way to x= +
infinity...

I use the GraphTheory package to draw graphs with DrawGraph. These drawings, I often use for educational purposes or for scientific papers. However, in black and white these graphs are not very clear. I would like to change the form of the nodes and the color of the edges and nodes. Is this possible?

Hello, just a couple plotting related questions.

1.  I have a plot with 3 curves on it and the legend appears with curve 1,2, and 3 vertically stacked instead of horizontally side by side.  This shrinks my image incredibly.   How can I change this? 

im having a problem to do a PWM(pulse width modulation) using maple..please anybody know to do it..

HI all,

Here is an excerpt of a procedure I am working on:

>for i from 0 to N while T[i] <= rb do

>......

>Calculations

>.....

>X[1+i] := evalf(F(T[i],X[i]),15);
>T[1+i] := evalf(T[i]+h, 15);
>end do:

where rb is the rignt boundery

For example, if N equal 1000, knowing that X(T[0])=X[0] and F is an arrow procedure that depends on T[i] and X[i],  I will have 1001 elements that I could put in a list like:

[  [t[0],X[0]], [t[1],X[1]], ....]

I have Maple 11.01 and Im doing simple taylor and series commands. Perhaps I'm doing something wrong but I cant figure out what it is. This is my problem:

f := arctan(3*x);
taylor(f,x=0,3);


and the output from the function is: 3*x+O(x^3) but my "Texas Instruments TI-89 Titanium" and the "Maple TA" website say that the correct answer is 3*x-9*x^3

Good Day!

I numerically solved a system of ODEs with dsolve for the functions p(x) and q(x) over the domain x=[-1,+1].  Boundary conditions are specified at x=-1 and x=+1.  The output is a listprocedure.  

I want to determine the n-th derivatives of p(x) and q(x) at x=0.  Alternatively, I want the power series representation of p(x) and q(x) about x=0.

I would appreciate any advice on how to use Maple 10 to accomplish this.

Thanks.

Glenn

Hi I'm looking for a way to represent groups in Maple.  I have looked at the groups package, and still don't know how to deal with cyclic groups, or how to deal with elements of a group.  Note, I think I know how to do these things for permutation groups but what if I want to do it with a different group, like Z3. I really appreciate any help you can give me, thank you.