I have a rather large multivatiate polynomial "Dtest"  I need to divie it by a cubic poly "DGm" using rem and quo. Both are determinants multiplied out,  both given below. Have spent the past 2 nights trying to sort, collect, expand, equate coefficients plex groebner etc. Am trying to collect up all the powers of c₃ but cant anything to work. even expand doesn't fully expand "Dtest". If I set c₁ and c₂ to 1 things are...

Hi guys

Is there any build-in function which converts [[x>5, x<10], [x < 0]] to "x>5 and x<10 or x<0"? I've written my own function, but I want something build-in.

Thanks :)

Hi everyone,

Working on my project, I have this error "Error, (in VectorCalculus:--) too many levels of recursion".

The project is about filetring a stochastic process.

When I want to calculate one of the integrals, I have that error.

Here is the code:

Rxi:=sqrt(d)*IdentityMatrix(4):

xi:=WienerProcess(Rxi);

Reta:=sqrt(d)*IdentityMatrix(2):
eta:=Array([WienerProcess(Reta...

Hi, I am trying to solve the following differential systems using dsolve numeric but there is something wrong with my code.

I am fairly new to Maple and cant work out why it is telling me that it doesnt work. COuld somebody help me?

DifferentialSystem := {diff(r(t),t$2)-r*(diff(theta(t),t)^2=-1000/r^2 ,
                            r(diff(theta(t),t$2)+2(diff(r(t),t)*(diff(theta(t),t)=0,
                            r(0)=sqrt(65), theta(0)=1.446...

I have to solve a linear system

in Maple. A is a tridiagonal matrix.

My problem is that my matrix A is big and therefore, I have to wait too long. Is there some function in Maple that can help this problem?

Hi. I have a question that concerns indices of vector of functions within for-loop.

I have a following piece of code:

Check the correctness of the solution by substituting for all found roots.

This are my found roots:

a:=12+10x^4+7x^3-89x^2+65x

and i found my roots (e.g);

b:= -3.5666666666,1.238969999,5.7777777,8888888888

Hi,

I am trying to plot in Maple 16 (just installed) and I am getting text output. Maple 15 worked just fine.

Anyone have ideas?

Regards.

> plot3d(x^2-y^2, x = -2 .. 2, y = -2 .. 2);
%;

                                  ...

Hi all, I am a teacher of middle/high school math. I have found that when I use the solve function on:

I get 5.674999999

In fact, as I was typing the above equation just now using Maple Math, I noticed it returns:

The Export function in ExcelTools completely overwrites Excel 2010 ".xlsx" files with no errors or messages.  The same command works properly for Excel 2003 ".xls" files.  It looks like a bug to me.

Hi, 
I'm trying to visualize a 3-Dimensional function, the color being the 4th dimension. All the examples that I have found of the so called plot3d function only involve 2D functions, the third dimension really being the return value of the function. I need more: I have a 3D function which takes in (x,y,z) if you like, and outputs one number. I'd like to visualize this function in maple. 

Thanks, 
~Austen 

Hi,

See the code mli.mws

What is the mistake in this command ?

chfonc:=cat('piecewise(' , seq(cat(convert(t<lf[k],string) , ' , 1 , ' ,convert(t<lf[k],string), ' , 1 , ' ) , k=1..p) , '1) ') :

I am trying to solve three non-linear coupled initial value problems. The equations are a bit complicated. The MAPLE code is 

restart

with*plots

eq[1] := (1/6)*Ra*v(x)^3*((2*v(x)*w(x)^2*(v(x)^2/w(x)^2-3)*(diff(w(x), x))-6*w(x)^3*(1-v(x)/w(x))^2*(diff(v(x), x)))*A+v(x)^2*w(x)^2*(2*v(x)/w(x)-3)*(diff(w(x), x))-3*w(x)^4*(1-v(x)/w(x))^2*(diff(v(x), x)))/(w(x)^2*(w(x)+2*A)^2*(2*v(x)+3*B))+u(x)

eq[2] := (1/105)*(diff(u(x)^2*(v(x)^2+11*B*v(x)+39*B^2...

The following simple code

myproc1:=proc({parlist::list:=[]})
return parlist[1];
end proc:

myproc2:=proc(parlist::list)
return myproc1('parlist'=parlist);
end proc:

myproc2([1,2]);

fails with


Error, (in myproc1) invalid subscript selector

The reason is that myproc1 has the optional argument parlist, which has the same name as myproc2. myproc2 seems to make...

First of, thank you commenters, you have helped me so much in the past!

I am doing a matrix inversion with random numbers and I would like to loop the process, and have each inverstion go into a matrix, such that the matrix will be a bunch of rows ( i number of rows) and three columns (the matrix inversion yeieds three values)

> for i to 2 do;
> 
> a1h := Generate(float(range = 0.1316881e-2 .. 0.1359706e-2)); a1f := Generate(float(range = .317149811 .. .327463626...