Hi, here is what I have, I would like to get A[1],A[2],A[3]...A[20] which are 18x18 matrix.
Then I would like to specify certain value for example A[4](2,3), or A[5](1,8) etc.... But there seem to be something wrong with my definition of A[m], I could not write A[m](i,j).
When i type A[4], it does not give me a 18x18 matrix. Please help. Thanks. 

with(LinearAlgebra):
interface(rtablesize=infinity):

lam:=RandomMatrix(18);

I’ve created a basic model of a two-lane road.

Is there a way to get Maple 16 into my linux menu (Linux Mint)?  My workaround has been to copy the Maple executable to the desktop.

What changes should I make to make it sum up?

with(LinearAlgebra):
interface(rtablesize=infinity):

for k from 2 to 21 do
A[k]:=Matrix(18);
P[k]:=Matrix(18);
Ct[k]:=Matrix(18);
for i from 1 to (k-1) do
Ct[k]:=A[k-i].P[i];    ####what changes to make here? 
end do:
end do:

I would like to get
Ct[2]=A[1].P[1]
Ct[3]=A[2].P[1]+A[1].P[2]
Ct[4]=A[3].P[1]+A[2].P[2]+A[1].P[3]
.....
Ct[21]=A[20].P[1...

Hi everyone,

I need to expand a sum inside a single multiple integral into separate integrals, as in:

  /                          /                  /
 |                 ...

I need to solve some  transcendental equations, using Maple 16 which i need to transform or bind with java later. My problem is I cant evaluate.

Equation I would like to evaluate is  offcourse I  defined m and M, prior to c.
Both  eval(k) and evalf (k)  only return k,  I need value for further calculations.

Dear All:

 I have a curve about mosfet  Coss Vs. Vds . the detail math relationship can be found in the following picture: 

 Can anyone fitting this picture by simple math function.

 PS: pls don't considering piecewise function 

i am successfully transforming a 2D plot, when doing the exact analog thing to a 3D plot i get the error message 

Error, (in t) invalid input: unknown uses a 3rd argument, z, which is missing

i have no idea what's going on, please advise.

i made a minimum example:

this works:

> restart:with(plots):with(plottools):
> norm2:=x->x[1]^2+x[2]^2:
> N:=[0,1]:
> phi:=(x,y)->N+2*([x,y]-N)/norm2([x,y]-N):

hi! I have this worksheet with some errrors and I don't know how to solve this.proiect_dm.mw

please help me!

It is possible, using the image tools package, embed a text and a geometric figure in a picture?

 How to proceed?

Gracias

I try to use fsolve to solve a set of equations for real parameters alphaij, thetha (they are the real angle and phases in the parametrization of a unitary 2x2 matrix)

assume(alpha11::real,alpha12::real,alpha22::real,theta::real);

myresult:=timelimit(10*time_max,fsolve({mat_M_V[2,1]=0,mat_M_V[1,2]=0,Im(mat_M_V[1,1])=0,Im(mat_M_V[2,2])=0},{alpha11=0,alpha22=0,alpha12=0,theta=0},'fulldigits'));

unfortunately fsolve ignores my assumptions and returns complex solutions

Hi, here is what I have. How do I assign the each A please?

with(LinearAlgebra):
interface(rtablesize=infinity):

A:=seq(Matrix(18),i=1..21):
A[1]:=IdentityMatrix(18):

It wouldn't allow me to assign A[1]. May I know how do I do it please?

Thanks

Hello, 

For a beam vibration problem I want to animate a function w composed of a time dependent part p(t) and a coordinate dependent part W(x).

w(x,t)=W(x)*p(t)

The coordinate dependent part is an analytical function, but the time dependent part is sequence of a cetrain length with numeric data [{value},{time}]. The code that I used for animating a fully analytical function therefore can't work anymore.

w := W*p: 
with(plots...

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;