Hello,

first of all, this is my very fist question in this forum, so please excuse some formal mistakes I may make...

Using Maple 18.01 on Windows 7 64bit

To the topic: I want to calculate the eigenvalues of a complex matrix like this (just as an example):

M := Matrix(2, 2, {(1, 1) = a+2.5*I, (1, 2) = 1-I*a, (2, 1) = 4, (2, 2) = a})

When I try to calculate

Eigenvalues(M)

I get

Error, (in LinearAlgebra:-Eigenvalues) expecting either Matrices of rationals, rational functions, radical functions, algebraic numbers, or algebraic functions, or Matrices of complex(numeric) values

Strange, because if I replace the "2.5" with just "2", so an integer instead of a float, I get results:

I don't understand this strange behavior, since Mathematica i.e. calculates everything just fine...:

Thanks in advance for any suggestions.

How to get the equations of circles A, B, C, such as circle A with center (1,1) is drawn in the first quadrant.

Circle B with radius 2 and circle C are placed so that each circle is tangent to the other 2 circles and the x-axis.

THe 3 circles are on the first quadrant.

1) do it with Maple

2) do it by hand

3) draw the figure

Regards

solve([b+c = a*a1+b*a4+c*a7, a+c=a a2+b a5+c a8, a+b = a*a3+b*a6+c*a9], [a1,a2,a3,a4,a5,a6,a7,a8,a9]);

how to assume a1 to a9 are 0 or 1

and find one of possible matrix is

Expected Result := Matrix([[1,1,0],[1,0,1],[0,1,1]]);

Hi everyone,

I am exploring the physics package a bit. However, in the documentation I didn't find anything about how to setup operator-ket relations like:

A | l,m,n > = f(l,m,n) | g(l,m,n), h(l,m,n), z(l,m,n) >

The Creation and Annihilation operators were the only predefined ones I found.

Cheers

NOh

Greetings,

I am a Maple 15 Student Edition user on both Windows and Linux. I wonder if it is possible to see the actual command send to Maple when I click on a particular entry in the right click context menu. If it is possible to do so, how can I have it displayed in document/worksheet mode? Does it matter if I am inputting in 1D or 2D?

Thanks in advance

Hi there,

first post. I am a beginner both with Maple and this forum, so please forgive my mistakes. Just here to learn.

I could not successfully use the Maple editor here, so the code goes as plain text, although I also attach the code: MapleSimulation_test.mw.

I am trying to simulate the function below for certain values of the parameters, but when executing the loop, Maple prints just R. Can anyone tell me where my error is, please?

f := .25; g := 1; R[0] = 5; R[1] = 4.8; nDays := 30;

lambda1:=(1 - f + sqrt((1 - f) + 4*g*f)*1/2;

lambda2:=(1 - f - sqrt((1 - f) + 4*g*f)*1/2;

       -lambda2*R[0] + R[1]
k1:=--------------------------;
       lambda1 - lambda2

       lambda2*R[0] - R[1]
k2:=-------------------------;
      lambda1 - lambda2

R:=n-> k1*lambda1^n + k2*lambda2^n

for n from 2 to nDays
do R:=evalf(subs(n=%,R));
od;

Hi everyone,

I have to create a double wishbone suspesione model that can be edited by different users, only introducing some reference point values (called Hard Points). So I need some tool that, in some way, passes from the entered reference point values to the actual values of the bodyframes link. 

I found an already done model (from this link) that seems to be perfect to me because contains an attached Maple document that does exactly what I need working on the base of symbolic parameters applied to the MapleSim model. Now my problem is that I need to deeply change the model and so having the possibility to change the parameter set and insert for example nex parameters. But when I try to do that some problems come out with the Maple document: the syntax of the nex parameter set is different from the default (in the sense of already built in the model I downloaded) one and there are some syntax errors. Below I'll put a screenshot of the error.

under the XData code line, you can also see the syntax of one of the parameters that is very long and complicated: below I'll insert another image from which it can be seen the syntax with the original parameter set.

Now if you another idea for solving the initial problem, that would be great! Instead do you have an idea on how to fix the problem with the downloaded model? In my opinion there is a different MapleSim version problem, in the sense that could be thatn the model I downloaded has been done in another MapleSim version in which the parameter set syntax was different.

is it possible to assume element of matrix 0 or 1

how to write?

after write this, is it possible to display possible matrices which each element is 0 or 1

with(LinearAlgebra):
GetRing := proc(sol)
ringequation := 0;
mono1 := 0;
for j from 1 to 3 do
mono1 := 1;
for i from 1 to nops(sol[1][j]) do
mono1 := mono1*op(i, sol[1][j]);
od:
ringequation := ringequation + mono1;
od:
return ringequation;
end proc;
M := Matrix([[a1,a2,a3],[a4,a5,a6],[a7,a8,a9]]);
sys := a*b+a = GetRing(MatrixMatrixMultiply(Matrix([[a,b,c]]), M));
solve(sys);

I am running a huge symbolic problem in Maple 18. At the moment, I dont even know if there is enough computational power to suceed the computation.

However, I'd like to save a progress. And maybe to continue computation later.

Is there any way to save progress?

Hi Maple friends.

For the function x^3-3*x^2-24*x+8, I right-click and choose "Evaluate at a point", and then enter the x value to evaluate.

Maple ouputs 

eval( x^3-3*x^2-24*x+8, [x = -2]);

36

But I would like to evaluate at x=-2,4,6, 9.

How can I quickly do this, without having to right-click for all points? If there is any Maple employee reading this, please provide a function in the context menu to evaluate at more than one point. It becomes very tedious when I have 10 functions and need to evaluate up to 10 points for each function.

Thanks in advance.

N := 8;

b := 2 ∗ P i;
data := [];
for n f rom 0 to N do
data := [op(data), [n ∗ b/N, sin(n ∗ b/N)]];
od;

Since exact points are not needed, changed the loop (and reinitialize) to:

data := [];

for n from 0 to N do
data := [op(data), [evalf(n ∗ b/N), sin(evalf(n ∗ b/N))]];
od;

Modify the second example so that it can be used to graph the sin function
over any interval from a to b. (You should suppress the output from the for-loop in your
example, so that you do not fill up the worksheet with an unwieldy amount of output.)

Hi all

How can I construct following triangular block matrix?

where

and

P is (N*M)*(N*M) and E and H are M*M matrices. t_f is known constant.

thanks in advance

Mahmood   Dadkhah

Ph.D Candidate

Applied Mathematics Department

My instructor gave me the problem lim as x goes to 0 of ((2 + x)^3 +8)/x I can't figure out how to get the lim as x goes to, to show up.  There is no button for it in the expressions pallette like there is for things like the piecewise function. My instructor won't help me.  Is there a basic guide I can buy or something.  This software isn't very intuitive. 

Dear all,

Let me first explain a problem I've encountered when working with Maple 18 64 bit in Linux (Ubuntu 12.04). I've tried some things to solve it, but unfortunately without succes

When working with the DifferentialAlgebra package I'm encountering a problem concerning memory. Without going into details, I'm using the RosenfeldGroebner function (DifferentialAlgebra/RosenfeldGroebner) . After about 10 minutes of calculation or so, the computation stops with the error message

>> Error, (in DifferentialAlgebra:-RosenfeldGroebner) out of memory error

This particular error does not have a *help*-file, so no help there.

Now, I'm pretty bumped out because of this error, because I'm working on 16 GB RAM computer which is imo quite a lot. Moreover, I have the feeling, that Maple is not using the full capacity of memory. This, is because I was monitoring the memory during the computation (via the System monitor). Before I start the calculation: the memory usage is about 3.6 GiB (=22.8%). During the calculation it slowly rises until about 8GiB (50%) at which the computation stops and the above-mentioned error message pops up. So it looks there's a big part (about 7.5-8 GiB) of memory still available, but isn't used.

So my question is: What are the possibilities to solve this problem. What can I try to do to have more memory available to be able to do the calculation.

Of course I was looking into the possibilities myself. In my experience I found the information found on this forum and on the Maple help files confusing or not very helpful. Probably, because I have little knowledge of programming or computer architecture. Nevertheless I would like to know some things about it. So, iI'll  present what I tried to do:

- The command kernelopts('datalimit') returns the total amout of heap memory in kibibtyes that Maple may consume   
  In my aplication this is set to infinity. So I presume that this could not explain why the program stops at only 50% Memory usage

- The command kernelopts('bytesalloc') returns the total amount of bytes allocated by Maple kernel. This value cannot be set.  Does this attribute pose a limit on calculations or is this  the amount of memory used by the Maple 'overhead'?   
In my application the value of this attribute is 8781824 bytes, so that's about 8 MB. I suppose it is not related to the problem I'm having, or is it? 

The command kernelopts('stacklimit') returns The total amount of stack space avilable. In my application this was initially set to 8160 kibityes. I've changed this to 8160000000, wel beyond the availble memory. I would think that this now would not anymore present a limit on the memory usage.

The command kernelopts('jvmheaplimit') returns the maximum amout of heap memory for the Java virtual machine. I presume this is the maximum amout of memory for the visiualisation part of Maple (is this correct) In my application this was initially set to 65536 kiB. I've changed this to 65536000000 kBib which is well above the available memroy. I would think that this now would not anymore present a limit on the memory usage

The command   kernelopts('cacheclearlimit'); returns the memory for maintaining temporary elements in cache. In my application this was initially 524288 kiB, but i changed this to 524288000000. I would think that, again, the limit on the memory usage would be gone.

I tried the calculation again with the mentioned changes in the memory attributes. Unfortunately, the error message *out of memory error* still popped up at about 50% memory usage.

Did I overlook something?? What can I do?? Is there actually that I can do? Where should I look?

Many thanks !!