I often have to create density plots with many (thousands of) points. Hence the first thing I do when I install a new version of maple on linux, is edit dir_of_maple/bin/maple so that

JAVAHEAP=512

is instead

JAVAHEAP=4096

I have done this for years and never have any memory problems. But recently I have sent my code to someone who runs Windows and they seem to have "out of memory" issues when trying to do density plots of large datasets.

Hello,

I am trying to modify Maple code so I have a vertical spring with a mass starting at (0,0). The spring with the mass should move right and left along x. My vertical spring move up instead of down while the mass move to the right .

Any Idea about how I can get the right movement of the spring?

Please ignore the equation eq since I am only trying to have an animation spring with a mass.

 Thank you

"Welch-Satterthwaite formula":
With the package "ScientificErrorAnalysis" is easily calculated, the combined uncertainty of a mathematical model M = f (x1, x1, .. xn). But if I need to know the components of the calculation model uncertainty becomes very repetitive. For example to calculate the expanded uncertainty should be calculated uncertainty components model for using the Welch-Satterthwaite formula ". Which determines the effective degrees of freedom υeff:

Determine if

[ 9 ]                         { [ 3 ]  [ 1 ]  [ 4 ]  [ 1 ] [ 5 ] }

[ 8 ]                         { [ 2 ]  [ 6 ]  [ 5 ]  [ 3 ] [ 5 ] }

[ 3 ] E (curvy E) span  { [ 9 ], [ 7 ], [ 9 ], [ 3 ],[ 2 ] }

I have the following problem with the commands "Infinitesimals" and "InvariantSolutions". After using them to a system of firsst-order PDE's, the following message appears:

 Error, (in table["k"]) expected a request of prolongation w.r.t one of 2 independent variables; received a request w.r.t the (inexistent) 4th one

Does anybody know, what this message means ? I am a beginner with the commands "Infinitesimals" and "InvariantSolutions"...

Good afternoon everbody,

I am trying to make a rational interpolation from the data of a function (values of the function for different points).
I tried to do it with the RationalInterpolation command but it requires too much time. Then I chose to solve the problem with the NonlinearFit command but the result varies a lot if I a change the basic function I want to approach and I always get a warning message: limiting numer of iterations reached.

 d^2(x)/d(t^2) + sin(x)=0  (1)

d^2(x)/d(t^2) + x = 0 (2)

d^2(x)/d(t^2) + ( x - (x)^3/6) = 0 (3)

1) Compare the results of numerical simulations of (1), (2), (3) to see how closely the period of the periodic orbits relate.

a) Perform a phase portrait ( (x)'(t) vs. x ) analysis for (1), (2), and (3).

b) Consider the initial conditions x(0)= x₀ and x'(0)=0. For what intervals of x₀ do the periodic orbits of (2...

Hi everybody. Firstly, i apologize for my poor level of english. I am a new maple user and i want to solve the following system, but I face some difficulties. I go through forum, FAQ, courses notes on the net and so on but I don't find the solution. 

I first define the folowing equations:

I was working with the computation of the eigenvectors of a 3X3 symmetric matrix with algebraic entries and Maple 17 doesn´t give me an answer after a long time, even with CUDA activated. You can see this by the commands below:

http://www.mapleprimes.com/questions/144384-Polynomials-Not-In-The-Correct-Indeterminates

above link's comment said eliminate will NOT generate a polynomial in all cases

make me think that eliminate in above link can not return correct one.

what is the correct way to convert groebner basis of kernel into kernel?

I sometimes like to work with worksheets in classic mode. However, I have just discovered that I cannot simply type "restart;" in the beginning of a worksheet in classic mode because it causes the worksheet window to freeze. However, if I click the "restart" button, then things go as normal. I really want to have each of my worksheets begin with the "restart;"  command. Need your assistant on a way out.

I use 64-bit windows 7 CORE i3 Dell Inspiron N4050.

having its diameter equal to three and its number of vertices equal to 32? Is it possible to find the one with Maple? The simpleminded approach
>with(GraphTheory):
>with(RandomGraphs):
> G := RandomRegularGraph(32, 4);
> Diameter(G);
produces 4 or 5.
What I know is http://www-ma4.upc.es/~comellas/delta-d/desc_g/desc_g3.html ( the second graph).

I mean not open these files, and ctrl+A select whole file and copy to one file.

I have been trying to find a solution to the following equation for ages! 

Vt:=(a*t)+((1/(2*Pi))*((b*cos(2*Pi*t))-(c*sin(2*Pi*t))-b)-295);

I need to find what t converges to, I have solved the equation using a different method and I know the answer is around 0.787 but I need to find the result using the Newton Raphson method, or another iterative method. I am not allowed to use dsolve. or the Newton command.

Dear All,

I am trying to find the exact amplitude and phase angle for the signal, with values attached using MATLAB.  BUT the phase angles doesn't make sense.  Can you guys help me in doing the FFT of the signal and find the amplitude and phase using MAPLE.   I am interested in,  fundamental component, 5th , 7th , 11th, 13th 15th, 17th and 19th harmonics with their phases.

I shall be very thankful if anyone of you can actually solve the problem.