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...

Hey there i have written the following code and it gets very slow cause of the output at each step, which is not needed. I only need the arrays at the end of the procedure. Has someone an idea how i can suppress the output for the steps betweend the start and the end of the procedure?

restart:
s_1 := 0.779e-1*t^2-.1345*t+.2031:
s_2 := 1.3502*t-6.8742:
s_3 := .1112*t^2-1.5108*t+11.527:
s_4 := 1.9322*t-15.099:
s_5 := -0.178e-1*t^2+2.648*t-22.312: