Hi, 

How can I create a matrix M by M with maple, where the elements of diagonal comes from b[i]=i+1 and the other elements comes from c[i,k]=i+k.

Amr

Using the Physics package I am trying to define commutation rules between operators. However it looks like when the commutator involves a Dagger, it is not "remembered" properly. Here is a (contrived) example (you might have to run it on your machine in case not clear from copy/paste what's going on):


restart:
with(Physics):

Setup(quantumoperators={a, b, c});
                ...

Hi:

How do I tell maple that some of my variables do not commute with each other?

For example i may have variables a_p and a_m which do not commute with each other, as well as s_x and s_y which also don't commute with each other... but a and s do commute. So basically I want maple to recognize that

a_m * a_p != a_p * a_m

but

a_m * x_s = x_s * a_m, etc..

... and be able to keep these rules when simplifying expressions.

Note,...

The code below changes the starting value of a to the last value of b (in Maple 14). Is that a feature?

> a := matrix(2, 2, [1, 2, 3, 4]);
> b := a;
> for i to 2 do for j to 2 do b[i, j] := (1/3)*b[i, j] end do end do;
> evalm(b);
> evalm(a);

I would like to include the current date in the filename when I use writedata.  How can I do that?

I know this doesn't work but I was trying to do something like this

  test:=[1,2,3,4,5,6]
  writedata("c:/data-FomatTime(%B%d%H%M).txt",test)

hi all

im reading documentation about mapleNET web services

"Currently the input strings must represent Maple 1-D expressions. The output will be Maple 1-D expressions."

what is Maple 1-D expressions?

Motion_of_a_Charged_.mw

Hi,

The procedure I uploaded, was originally written in C++. I made a text file and plot the file with C++ without any problem.

But in the maple version of the same program, when I use the command:

                          ...

I am using Maple to generate PDEs. I have expressions of the form p(dx,dy,dz, etc.) where p is a nonlinear polynomial. I would like to substitute d/dx for dx etc and then later apply the resulting differential equation to a function. I am having multiple problems with this.

1. Maple seems to be unable to handle a derivative unless there is a function for the derivative to act on. (This is not a huge issue, but it would be helpful.)

2. Even if I do specify a function Maple maps dx^3 to diff(f,x...

I would like to know how to plot different series of data on the same graph.

Thanks in Advance

hi all

in maplenet after next link  "/maplenet/imaging/image?maple=Histogram([1,2])"

i do not see image of Histogram, just image of formula 'Histogram([1,2])' , what need for generate image?

I'm trying to hide all text created in text mode (F5) so that all I see are the calculations or text typed in Math mode.  How do I do that? 

I could create subsections with text but that's bulky.  I've tried document blocks but that only hides the calculations, the opposite of what I wanted.  Have I missed something?

Hello,

I have a grafic, a power curve, and a few values of the curve.

The values are in 0.5 steps. I would like to calculate the values for all the 0.1 steps.

For example:

I know the values for 4, 4.5, 5 etc. and would like to find out the values for 4.1, 4.2, 4.3 etc.

Is this possible using Maple?

Best regards,

Calin

When I plot csc(k*x) for various values of k, the timing varies considerably depending on the value of k.

Here are the timings for k = 1..5 (note the strange case of k = 3):

  seq(time(plot(csc(k*x), x = 0 .. 2*Pi, -3 .. 3, discont = true)), k = 1 .. 5);
               0.031, 0.031, 14.133, 0.046, 0.062

For k = 6, the time is apalling:

I was wondering if anyone has any experience with conic optimization (ie Mosek)
to solve large scale portfolio optimization problems. It all seem so complicated.
It should be possible to call such an optimization engine from Maple right?!

Hi

I'm looking for this application : "A Double Pendulum Model using DynaFlexPro and Maple"

Does anyone have it ?
Indeed,it's no more on this site : http://www.maplesoft.com/applications/view.aspx?SID=1682
I really need to make a simulation of the motion of a double pendulum, using Maple.