I bought a Mac Pro with 12 core. I try to evaluate the resultant of 5 multivariant polynomials of five variables (as the polynomials are rather irregular, the usual tricks does not work). By using resultant to eliminate one variable at a time, I can get the final resultant with one variable. Is there a way to parallet program it, so that 12 core can all be used? Why sometime, the program is said to be evaluating, but the clock is not moving?

I'm very new to Maple and I'm just curious as to how Maple computes its summations with the MatrixPower command.

if A = a real square matrix

c = some real constant

x = c*A

then Why is it, that when I try to use...

sum(MatrixPower(x,k), k = 0..3);

I get a non-real / ridiculous result, but when I type it out...

MatrixPower(x,0) + MatrixPower(x,1) + MatrixPower(x,2) + MatrixPower(x,3);

x^0 + x^1 + x^2 + x^3;

plot3d(sin(sqrt(x^2+y^2))/sqrt(x^2+y^2),x=-3..3,y=-3..3);

the command above makes a figure which has a hole(means discontinuity) at the (0,0).

is it a bug?

athlon 4400+,2GB RAM,win xp 32.

Hi,

I am solving a quadratic programing problem, and I use QPSolve command in maple (I use this command on two 4by4 matrices, and I use maple13), but it gives me an answer with the following warning:

Warning, limiting number of iterations reached!

Does any one know what is that, and what should I do?

I will be appreciated.

Bests,

Elham

This is branched from Maple 16.01

I don't know the reason for the break.  In trying to replicate the graph shown for Mathematica for Maple I am finding it difficult to locate the number of mathematical functions for various versions of Maple. 

The only reference I find is that Maple 16 contains over 5000 mathematical functions, many more than Mathematica 8, but they are programmed different so I can't compare that.  However trying to compare it...

i am looking for a command adjoint a ODE, to check whether my understanding of adjoint correct or not, when i find one example different from my understanding as follows

u*diff(Y,t) - diff(U,t) + diff(y,t)*U = 0 where uppercase and lowercase are different

why after adjoint is

Y -> -u*diff(lambda,t) - diff(u,t)*lambda = miu1
U -> diff(lambda,t) + diff(y,t)*lambda = miu2

why not

Y -> u*diff(lambda,t) = miu1
U -> -diff(lambda,t) + diff(y,t)*lambda = miu2

A := diff(Y,y$2)-(y11)^2*diff(Y,y) = 0
B := diff(diff(Y,x),y) - y11*diff(Y,x$2) = 0

do maple have tool to get differential identity, or simple algebra identity?
that identity is an equation in terms of A and B and y11, not Y

I have two problems with type declarations in procedures. They seem to be related, so I'll ask both questions at once.

1. One problem is that I make this sort of declaration.

{[n,N]::positive:=1}

where n could be an integer or a float, but not negative nor complex. I'm not sure what's wrong with the code below: the type-checking fails, but I don't understand why. I followed the template laid out by Preben here:
http://www.mapleprimes.com/questions/134550...

Hello, I have this question:

I have to plot the roots of a polynomial of the 6th degree, a*t⁶ + b*t⁵ + c*t⁴ + d*t³ + e*t² + f*t = 0, where

a,b,c,d,e,f = g(sigma), then I use implicitplot function to plot t as function of sigma, I want to generate an array, vector or list of pairs as (sigma,t).

Thanks,

Benjamin.

I am writing a module that will have several procedures. This module will be loaded using "with(modulename)."

Inside one of the procedures (a procedure dealing with opening a data file) I am testing for the existence of a file and, if it does not exist, it should open a filedialog so I can navigate to the relevant folder that has the file. Like this (test is set from the existence-checker to be true or false):

if (not test) then # have to get and set currentdir

A simple question. I have looked at the help pages on "passing" and "declaring" arguments, which are very detailed, but couldn't quite spot the answer to my question, though I suspect it is there somewhere.

I have 2 procedures and want to pass the argument of one procedure to another procedure used therein. In the basic case, I seem to be able to do it without special precautions. However, I have not been able to make it work in a situation involving multiple spellings for the arguments ...

I installed Maple 15 for windows 64 bit on my pc but I have a problem with worksheet in its.

Worksheet isnt on my software.

sys := diff(y,t$3) + 3*diff(y,t$2) + 5*diff(y,t)  = diff(u,t$3) + diff(u,t$2) + diff(u,t)

x1 = diff(y,t)
x2 = diff(y,t$2)
x3 = diff(y,t$3)

how to do simple parametrization with x1, x2, x3 on sys, so that get 3 equations in terms of x1, x2, x3, u
result may be first order of x1, x2, x3

Dear Maple Users

In Maple 16 I read in the menu Help > What's New that it is now possible to have 3D plots exported as vector graphics, when using EPS export. I tried it, but could not open the resulting EPS file. I used my CorelDRAW 15 Suite ... Can someone tell me how I get access to the exported vector graphics?

If I cannot get it into CorelDRAW, it is not for much use. Maybe an intermediate process?

Regards,

Erik

How to implement the following procedure using the function Maple Statistics [CrossCorrelation]?  

alias(FFT = DiscreteTransforms[FourierTransform], IFFT = DiscreteTransforms[InverseFourierTransform]);

nd := Statistics:-Sample(Normal(0, 1));

 xcorr := proc (x, y)
local corrLength, c;
corrLength := op(1, x)+op(1, y)-1;
c := IFFT(`~`[`*`](FFT(Vector(corrLength, x, fill = 0), normalization = none), `~`[conjugate](FFT(Vector(corrLength, y, fill = 0...