Hi,

I have this matrix with coefficients that I need to estimate;

I get there after some simple calculations and I know that my matrix it´s equal to the zero matrix; I have something like:

A:=Matrix(3, 3, [5*a-4,  5*sqrt(a) *sqrt(b)-5, 7*sqrt(a) *sqrt(c)-6,  

        8*sqrt(a) *sqrt(b)-5, 8*b-2,  8*sqrt(b) *sqrt(c)-9,   

        4*sqrt(a...

Hello, i'm having a problem whit my code for Finites Differences, but I don't really understand why. 

The principal error said this "

Error, (in fsolve) eq[2] is in the equation, and is not solved for"

The other errors come from this one, but the strange thing is my code work whit differents "h"

For example whit h=1 it works, but with h=2.5;0.5;0.1 It doesn't works.

Please help I'm kind of amateur whit Maple

I would like to be able to read Maple manuals and the AEM book that I have bought on the ipad. I can understand that I will not be able to run the commands. But it woud be nice to read through the different sections while reclining on my bed. Hope that you will make it possible.

I am using the function solve() to find roots of a trig. equation. Such as for sin(k*x) = 0, Maple retuns x = 0, whereas I expecting to get  x = n ∏/k, for n = 0,1,2,.... I am sorry I am new to Maple, can anyone help me get what I am looking for?

Thank you

 What justifies the t-1; to achieve this result?

restart;
interface(warnlevel = 0, imaginaryunit = I, rtablesize = 12);
with(plots); with(plottools);
alias(FFT = DiscreteTransforms[FourierTransform], IFFT = DiscreteTransforms[InverseFourierTransform]);

Temp := [24.2, 28.4, 32.7, 39.7, 47.0, 53.0, 56.0, 55.0, 49.4, 42.2, 32.0, 27.1];
POI := seq([n, Temp[n]], n = 1 .. 12);

 p1 := pointplot([POI], labels = ["x~month", "y = Temperature~ºF"...

Hi,

I have enjoyed Maple computer algebra system as a platform for some work on prime constellations.  A summary of my work is here -

https://sites.google.com/site/primeconstellations/

At the bottom of the page are 3 relevant files and the filenames start with "A constellation"  Two of those files are .mw files.  The code searches the integers for solutions, and it works fine, but after about half a day, it consistantly crashes.  I...

How to plot a dynamical system as x' = f(x,y,z) , y'=g(x,y,z) . z'=h(x,y,z) ?

e.g.    x'=(x z )/y - x - 1

         y'=x y - 5 x z + y

         z'=( x z^3 )/y+( z^2)/y+6z

Hello!

I am trying to solve the differential equation:

for , 

From the page:

http://www.maplesoft.com/products/system_requirements.aspx

it would seem like ubuntu 12.04 is not officially supported for Maple 16. Could someone from Maplesoft comment if there are plans to add support with perhaps a patch? or will we have to wait until Maple 17?

I need to update for certain sofware, but would want to make sure I can run maple in an uncompromised way.

thanks

Hi

I browsed the forums but could not find a solution to my problem. Ii have a system of differential equations; however, I have the solution to one of the functions as an integral of another function in the system, but since the solutions are all numerical I don't know how to implement this. Here's the system and what I tried at first

#######################

eq1 := diff(W(r), r) = -(1-beta*(W(r)-W0))*(M(r)+4*Pi*r^3*p(r))/(beta*r*(r-2*M(r)));

balle := proc (L) local K, a, i, c, J;
J := L;
 c := nops(J);
 while J <> K do
K := J;
for i from 0 to c-1 do
if J[i+1] < J[i] then
a := J[i]; J[i] := J[i+1]; J[i+1] := a
end if
end do
end do;
return J
end proc

I got the error "Error, (in balle) invalid subscript selector " even if L is a list. I don't understand. Could you help me, pretty please? 

Hi everyone.

I need to plot a graph of y against x for the solutions for values of t form 0 to 0.003 seconds using

c=50m/s

beta=10

A=0.01m

L=0.5m

The equation is y(x,t) = A*e^(-beta(x-L-ct)^2/(L^2))

I also need to show that the above equation can be a solution for (d^2y/dt^2) = c^2 * (d^2y/dx^2) on maple.

Cheers if anyone could help me with this.

On several occasions, while working with lists or Matrices, I have been drawn to using a combination of seq and if, as in the following:

seq(`if`(a,b,c), i = 1 .. 10 )

This appears to be a powerful approach. Unfortunately, I have not found much documentation on it.

I have been able to pattern-guess to a limited extent for my limited needs.

Would you know of a good place to go for information?

My understanding is: "a" is the conditional...

I have found very little help about the Generate command of the RandomTools package.

I also have minor gripes about the syntax. And what better way to deal with these than to voice them?

This is how I was able to generate random lists and random Matrices.

A list of 10 random integers between 1 and 100:

L := RandomTools:-Generate(list(integer(range=1..100),10));

      L := [47, 8, 46, 44, 9, 77, 59, 16, 1, 70]