Hi everyone, I am getting this error message in maple can i get any help

Error, (in DynamicSystems:-RouthTable:-RouthTable) the polynomial must not contain complex values

Hi all

Can anyone suggest ways of speeding up this code ?

div_vec := proc(a::Vector,b::Vector)
  # procedure returns the element-byelement
  # division of vector a by vector b
  local i,c:
  c:=Vector(Dimension(a)):
  for i from 1 to Dimension(a) do
    c[i]:= a[i]/b[i]:
  end do:
  return c:
end proc:

Thanks

LR

Let G be an undirected graph having the vertices V={1,...,n}. A subset {i,j,k} is said to be a triangle of G if the complete graph with these vertices is a subgraph of G.
How to find the number of all triangles of G in an optimal way? The code should work with RandomGraph(400,1000).

I am plotting a curve generated from odeplot and I would like to fill the area under this curve.  I have tried filled=true and filled=[color="Blue",transparency=0.5] in the call to odeplot but it only plots the curve with no underfill.  Please advise on how to shade the area under a curve generated from odeplot.  Thanks very much.

Is there a simple way to have Maple re-formulate an expression like:

  r^2 * sum(A(j)*r^(n+j))

to :

  sum(A(j)*r^(n+j+2)

simplity, collect doesn't seem to do it.

Is there a simple function, or does one have to revert to the subsop procesure reported in a 2008 post.

Thanks.

Hi

I am working with mapleSim in two different computers, one in my school and another that is mine. I am using dropbox to keep the mapleSim documents and the costum component that i am creating synchronized in both PC´s. But i have noticed that mapleSim store the file that i attacht in another folder, so when i change the components equations in one document, on the other PC there are no changes. Is it possible to change the folder where the...

I want maple 15 to show me how it works out the formula (transposition) from N = 40^(1.5t) to t = 0.666..7(ln(1/40)*N)

I want to know how it transposes this formula from N to t I want the steps the actual working, I can't seem to figure it out as I'm using maple 15 as a learning tool, I have all the student modules installed but have no idea what I'm doing here

> N = 40*exp(1.5*t);
                       N = 40 exp(1.5 t)

Hello

I need some help on a problem which seems simple...

I'm doing as follows:

restart; with(LinearAlgebra); with(plots):

II[C] := proc (delta) options operator, arrow; 230/(84192.96489-230*cos(delta)+(-1)*4128.950345*sin(delta)) end proc

(sorry for the formatting)

plot(II[C](delta), delta = -Pi .. Pi)

(This works just fine and produces a nice plot, then I continue)

f1 := plot(II[C](delta), delta = -Pi .. Pi)

Hi guys,

I tried many days but cannot find where to download or buy MapleNet 15. Please help me I am so appriciated.

Hi all,

I wonder if it makes sense to use tables as datatype for efficient maple code. I need this datatype to pass parameters to a procedure which is called many times.

In particular, I have the following criteria:

* efficient (fast) to access for read and write.

* potentially thread save ( I can also imagine having individual copies for each thread)

* present in future Maple versions

* easy to transform into C-code later

Hi, I have a J(5x5 diagonal matrix), I have M(5x5 matrix). Let i be my rows and j be my columns. I'm trying to calculate [A]_ij = ([M]_ij)/(JJ_i-JJ_j-2)

I cant think of a proper way to do it. Please help.

M:=Matrix([[2,5,7,9,8],[8,5,2,6,8],[5,4,5,5,7],[1,4,9,6,6]])

J:=Vector([3,5,4,9,6])

JJ:=DiagonalMatrix(J)

A₁₁=2/(3-3-2), A₁₂

Hi. I have nodes:=7

How do i write a matrix with my first set of nodes = -1 and a second set as 1, in a diagonal form? Sort of like a identity matrix but not quite.

What I did was to write J:=Matrix([[-1,-1,-1,-1,-1,-1,-1,1,1,1,1,1,1,1]])    ####my vector will have 2 times the number of my nodes.

Then DiagonalMatrix(J)

But I then want to change my number of nodes. Could you please advice if there's a smarter way to do this please?

I want to solve equations,program in maple as follows:

solve({n = b+2*c+q+2*r, (a+b+c)/(p+q+r) = 9, n*b-3.32*a*(a+p+2*n)*10^(-7)*t^(5/2)*exp(-18.27*10^4/t) = 0, n*c-3.32*a*(a+p+2*n)*10^(-7)*t^(5/2)*exp(-32.035*10^4/t) = 0, n*q-3.32*p*(a+p+2*n)*10^(-7)*t^(5/2)*exp(-9.16*10^4/t) = 0, n*r-3.32*p*(a+p+2*n)*10^(-7)*t^(5/2)*exp(-18.77*10^4/t) = 0, a+b+c+p+q+r+n-.73*10^28/t = 0}, {a, b, c, n, p, q, r})

I can't get the results but  "Warning, solutions may have been lost"

Can anyone help me write a procedure for Maple 15 that does the following:

INPUT: number of unknowns and equations n; augmented matrix A=[aij], where 1<=i<=n and 1<=j<=n+1.
OUTPUT: solution x[1], x[2], ... , x[n] or message that the linear system has no unique solution.

Step 1: For i=1,...,n-1 do steps 2-4.  # Elimination process.

Step 2: Let p be the smallest integer with i<=p<=n and A[p,i]≠0.
          ...

every time I enter / or ^, maple automatically changed the text I entered into fraction or power, and I am having hard time enter equations normally like the way I do in graphic calculator or matlab. I am forced to type all my equations on a text pad and then copy over.

is there a way to stop maple from auto formatting my input text? I am more of a matlab guy and I really need to use symbolics and integration abilities right now, but this version of maple is making...