Hello!

The command coulditbe works incorrectly with abs:

restart;

coulditbe(t,infinity);

                                 true
 It is OK.

I'm experimenting with a backtracking procedure to solve the subset-sum problem: given a list L of integers, and an integer N not in L, to see if elements of L can be found which sum to N.  Basically the procedure works recursively, adding elements to the current list until either the sum equals N, in which case we stop with a solution, or the sum exceeds N, in which case we go back one level: 

hi

i use under code for plot

but only vertex has been show

help me

with(plots);

The Maple11 loglog plot does a poor job in scaling and axis.  The plot works, but, compared to something like the Scilab bode plot, the scaling and axis presentation is poor.

Someone on another forum mentioned an application that improves this.  I searched and found nothing.

Is there an application that improves this?

tomdean

I want to use the STOP_COND option in dsolve when z(t)=0 and t>0.

This is because at t=0 z(t)=0, and I want it to continue until z(t) returns to 0 again.

Any ideas please?

Thomas Exercise 5.6.39 won't integrate on Maple. I tried it using int, simplify, eval, etc. But the answer won't show. The exercise is shown below.

Hi everyone.

I have a very particular situation here: I'm running a series of programs that grab string output from command line Maple as plaintext. For this reason, I don't have the normal Numerical Format dropdowns, etc., available to me for this issue.

Hi folks,

I'm trying to get the fundamental solution of

-diff(A,t)+a(x,t)*laplacian(A,[x,y,z])=0;

I had some troubles entering the code here, so I uploaded the maple commands here: http://pastebin.com/m2765fda0

when I call eval(phi(x,t,xi,tau));  to calculate the fundamental solution, I always get the error 'Error, (in w) numerical exception: division by 0'.

Shouldn't my assumptions avoid this error?

Thanks for your hints!

Manuel

Dear all,

     How can I fix the ratio of height to width as 0.618 when plotting figures ? The command scale=constrained seems not appropriate   If  someone  knows how to realize it , please tell me ASAP. Thank you very much ! 

Kindly regards,

Yours

huang 

f := sec(x)^2;
Int(f, x = 0 .. 5*Pi*(1/4)) = int(f, x = 0 .. 5*Pi*(1/4))

I enter the above in Mape 12 Student Edition, and the answer is infinity, but it's obviously 1.

How can I get Maple to display the obvious ?

I am using Maple 10 and i want to export as "jpg" files multiple columngraphs. These columngraphs are generated from:

>for k  from 1 to 100 by  5 do

ColumnGraph(points[k],color=blue,axes=BOXED,thickness=2,print(t=k),view=[0..26,0..0.1]);

od:

Then i use the command :

>for k  from 1 to 100 by  5 do

plotsetup(jpeg,plotoutput=`k.jpg`);

od;

but exports only one file called "k.jpg" .

Hello clever people,

Here's an easy question for you all I'm sure (though as a novice I've been stuck on this for hours).

Why is it that when I'm using Maple 12 some of my assignments don't seem to work while others do? Most of the time I don't have a problem assigning matricies and vectors but quite often Maple doesn't seem to want to recall the contents of a variable when performing operations.