Hey there,

i have an System in the form below.

I try to plot s over the angle t which is used in the functions (S,DS and DDS) but because maple uses t in the functions (s, v and a) as the time the calculated eigenfrequency doesnt fit to the System.

The eigenfrequency should be omega:=sqrt(c[0]/m[1])=1035 (over 360 degrees) but because of the angle time switch the eigefrequency is 1035 (over 1).

Has someone an idea how i can tell maple that t is an angle in degree? ...

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?