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Hi there, 

I want to know how I can animate a plot with more than one parameter? I can manage animating a plot with one parameter, using the 'animate' command, but this seems to be limited to a single parameter.

How could I do it? If it is not possivle in Maple 11, would such an option be implemented in Maple 15?

Also: If I would want to animate other things than plots, are there commands for that in Maple 11 / 15?

Thx :)

When I solve a certain equation I get a list of solutions t as below. I want to select some of the solutions and assign them to variables. In the program I am writing the number of items in the list of solutions will vary and so I cannot really select the list item by using t[3].t[4] etc. for example. 

I want to be able to select only the list items with say a square root sign or another term such as Pi, beta etc that appears in the list of solutions. So...

As I did not upgrade to Maple 14 when it came out, I am interested to know the differences between v15 and v13. Obviously, it is easy to get a comparison between v15 and v14, as all I need to do is study the promotional advertising. But is there a way of getting a comparison list between v15 and v13 ?



How do I standardize the size of ALL plots in a document or worksheet?

If I use


for |x|>1 I get a constant imaginary part of -sign(x) Pi/2.

Is this correct and if so can anyone help me understand why this is so?



Hi there,


I'm looking to merge the following two lists:




In the following way:


Basically so it takes alternate terms (i.e. L[1], M[1], L[2], M[2] etc.)


Any help would be appreciated!


Thanks, Sam


I am trying to solve the following differential coupled system :






I need to find the differential equation of the following situation:

There's is an epidemic in a city of a certain poupulation(P). The rate of the spread is propoptionnal to the to the number of people infected times the number of person who are not infected.

I need to find the differential equation of this situation where N(t) will represent the number of people infetected(N) bas on the time. The only information I have is the populaiont(P...



I have Maple 13 and I get the following error message "Error, (in pdsolve/numeric) unable to handle elliptic PDEs" while trying to solve a set of PDEs.

Does Maple 15 solve elliptic PDEs?




I wrote a loop which is too long but I need its continuity so I wrote all of them in one loop.
The problem is too much time is needed to run it,even maple cannot run it.
I do not know whether my software has a problem or the way I wrote the program is wrong.
I attached the file.

Hi! I have been searching the forum, but with no luck.  How do I get maple to handle graphs with multiple edges between vertices?  I can't seem to find a function for this.  Does one exist?  I tried to do this by coloring the edges, but they just get re-colored.

EE1:=[1, 2], [3, 1], [2, 3], [4, 5], [6, 4], [5, 6], [7, 8], [9, 7], [8, 9];
EE2:=[2, 3], [4, 2], [3, 4], [5, 6], [7, 5], [6, 7], [1, 8], [9, 1], [8, 9];
EE3:=[3, 4], [5, 3], [4, 5], [6, 7...

Not sure how to do this.  What I want to do is use maple to grab an RSS feed from the internet and use maple to put it into a readable format

In particular from this website and getting the rss feed xml style webpage from here


for q to 3 do

     phi[q] := x->p q x;

end do


       phi[1]:= x -> p q x


How to solve the following system of differentials equations using Maple:


f'' - g' + g =sin x

g' - g + f = cos x


subject to the initial conditions:


f(0)= 2, g(0)=1 , f'(0)=-1

Earlier this week a colleagues approached me with a problem he was trying to solve with Maple.

The basic problem is to compute the asymptotic expansion of an expression. It's not difficult to see the leading term of this expansion, but Maple's result does not match this expectation. Let me demonstrate:

B := (n,h) -> (n+h)!/r^(n+h) * (1+(P0+h*P1)*r/n);
                           /    (P0 + h P1) r\
          factorial(n + h) |1 + -------------|
                           \          n      /
(n, h) -> ------------------------------------
                         (n + h)             

simplify( asympt( B(n,1)/B(n,0)-1, n, 3 ) );
                            n + O(1)
asympt( simplify( B(n,1)/B(n,0)-1 ), n, 3 );
 n   1 + r P1 - r   P0 r + r P1 - r  P0 + (-1 - r P1 + r) P0 r
 - + ------------ + ------------------------------------------
 r        r                            r n                   

      /            2   \          
      \-r P1 + P0 r  P1/ P0    /1 \
    + --------------------- + O|--|
                2              | 3|
               n               \n /


The real issue is the drastically different results from the previous two commands.  The only difference in the commands is the explicit simplify before or after the call to asympt.

It would be best if this last expression could be seen in the form:

(n+1)/r + (P1-1) + (1-r*P0)*P1/n - r*(1-r*P0)*P0*P1/n^2 + O(1/n^3);
  n + 1            (1 - P0 r) P1   r (1 - P0 r) P0 P1    /1 \
  ----- + P1 - 1 + ------------- - ------------------ + O|--|
    r                    n                  2            | 3|
                                           n             \n /

What's the difference in the two uses of asympt? This simpler example appears to show the essence of what is going on. On one hand,

B := (n,h) -> 1/r^(n+h);
(n, h) -> --------
           (n + h)

simplify( asympt( B(n,1)/B(n,0)-1, n, 3 ) );
Error, (in asympt) unable to compute series

while on the other hand

asympt( simplify( B(n,1)/B(n,0)-1 ), n, 3 );
                              r - 1
                            - -----
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