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 ?

thanks,

Andrew

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

If I use

plot(Im(arctanh(x)),x=-2..2);

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:

L:=[[1,1,1,1,1],[1,1,1,1,1],[1,1]]

M:=[[],[],[],[],[],[0],[],[],[],[],[0],[],[]]

In the following way:

N:=[[1,1,1,1,1],[0],[1,1,1,1,1],[0],[1,1]]

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

Any help would be appreciated!

Thanks, Sam

Hello,

I am trying to solve the following differential coupled system :

DN:=diff(N(x),x)=a/4*(x+8*(sin(F(x)))^2/x)*N(x)*diff(F(x),x)^2;

Du:=diff(u(x),x)=a/8*((x^2+8*(sin(F(x)))^2)*(1-u(x)/x)*diff(F(x),x)^2+2*(sin(F(x)))^2+4*(sin(F(x)))^4/x^2);

DDF:=diff(F(x),x$2)=1/(N(x)*(1-u(x)/x)*(x^2+8*(sin(F(x)))^2))*(-(x^2+8*(sin(F(x)))^2)*diff(N(x),x)*(1-u(x)/x)*diff(F(x),x)+(1+4*(sin(F(x)))^2/x^2+4*(1-u(x)/x)*diff(F(x),x)^2)*N(x)*sin(2*F(x...

Hello:

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?

Thanks,

Amit

Hi
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.
thanks
result2_with_op90_to.mw

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 http://tomorrowsgaspricetoday.com/city/Hamilton/ and getting the rss feed xml style webpage from here http://tomorrowsgaspricetoday.com/rssfeed.php?city=16

phi:=array(1..3):

for q to 3 do

     phi[q] := x->p q x;

end do

Output

       phi[1]:= 

          phi[2]:=

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)              
                        r                     

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 );
                                   2                          
 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);
             1    
(n, h) -> --------
           (n + h)
          r       

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
                            - -----
                                r  

Hi, everyboyd I wan to draw a vertical line at theta:=Pi  for any function.

How can i do it.

Amr

In high school I was briefly fascinated by a triangular "jump all but one" game, commonly found at Cracker Barrel restaurants.  The basic premise is that any peg can "jump" over an adjacent peg to occupy the empty hole next to the jumped peg.  The jumped peg is then removed.  The goal is to continue jumping pegs until there is only one left.  

The instructions on the face of the Cracker Barrel version of this game say, "LEAVE ONLY ONE -- YOU'RE A GENIUS".  Wanting to claim the right to call myself a genius, unlike ordinary kids, who might just play the game a few times, I sat down on my Turbo-XT and started writing BASIC code.  The algorithm I came up with ran a bit slow, so I directed output to my printer and let it run over night.  In the morning the program was still chugging along.  I advanced the paper feed on the dot-matrix lineprinter -- the kind that used continuous feed paper with perforated edges and holes on each side.   Into view came 3 solutions represented by a string of numbers.   A quick check verified that I was now a genius.  

Hello,

I have this problem. I would like to construct clothoid as a transition curve between two arcs. The length of this curve has to be 30 meters. The start azimuth is 0.3773 (rad) and the start radius is -355.835 m.

How could I do that simply in Maple?

Thank you

zakyn