my system [u(t),v(t),w(t)] is highly non-linear. I want to understand the local behavior at [u=0,v=0,w=0]. The boundary conditions are as follows: u(0) is given but v(0) and w(0) are not. I want to know if there is a suitable choice of v(0) and w(0) such that the system will converge to the critical point [0,0,0].

Can this system be approximated by a linear system? Or by a two-dimensional system?

Hello,

Questions,

Can I use the solve function with complex number?

i.e) a simple example

7 = solve(magnitude((2+j7) / (1+j*x), x)

How to implement the above to solve x in Maple?

seems Maple doesn't treat the complex sign of j as complex.

ie)
solve(sqrt(5)=abs(1+k*I), k);

I got k as
-I*(5^(1/2)-1), (5^(1/2)+1)*I

I might expect the k for 2.

Thanks,

How do I go about calculating a chi value for a fit line?

Hi

I am trying to create a procedure for the Simpson function and i can't see why it is wrong.

This is what i have done but it keeps coming up with an error.

Hi,

I have created a test bank in MapleTA. The question types are Fill-in-the Blank. Since I am new to Maple T.A I am not sure if there is a way to change the setting to relaxed grading routine (case insensitive).

For Example - the text of the student response is checked for key words that have been specified by the instructor. The system ignores other text, extra white space, and capitalization in the student response. So, the student would get full credit if they use the key words anywhere in their response.

hi everyone,

how do I tell maple that an undefined constant e.g. K is positive and real, so that the command abs(K) results in K and not |K|?

Is there a general way of applying rules and bounds on constants without defining them directly?

thanks.

I would like to construct a Matrix containing the output of a function f(x,y) for different values of x and y, with the x-values varying (say) along the column and the y-values varying along the row.

Assume we have several impedance connected in parallel.

R1, L1, C1, R2

In Mathematics,

R_total = R1 || sL1 || 1/sC1 || R2

Is there possible to calculate the R_total using one of Maple function??

Hello,

Assume I have a transfer function in "s" term and symbolic parameters (A, B, C, and D).

TF := (1+s*D)/(A*s^2 + B*s + C)

Question:

How can I convert the above TF in generic form in term of damping ratio?

The generic form can be written as (1+sD)/(s^2 + 2*damp*wn*s + wn^2)

Should I use a "collrect" or "simpligy" function to re-write original TF in generic form?

Let's say we re-write TF in generic form.

I'm trying to plot two "inequal" using "display". I wrote the following code:

Hi,

I have the following matrix and I have to find it's nilpotent index...

0 0 0 0 0

6 0 0 0 0

0 2 0 0 0

0 0 8 0 0

0 0 0 3 0

I've tried various things like assigning the matrix to variable A then do a solve(A^X = 0) but I only get "warning solutions may have been lost"

Thanks for any help!

Hi

I am working on a Maplet which among other things plots a graph of a solution to an equation. I am wondering if there is some way I can dynamically change the size of the plotter object in the Maplet depending on the imput function. I can handle measuring the function if you will, I just don't know if Maple 13 has the capability to dynamically resize maplet objects at run time.

It would be a nice feature to have for the Maplet but I don't know if it is at all possible.

Thank you in advance

Why does the equality fail to hold in case of a positive geometric density (with the location parameter v=1,2,... if in general)? What's wrong: symbolical result or numerical evaluation? Thanks.
with(Statistics):
X := RandomVariable(Geometric(p))+1; M := Mean(X); A := simplify((X-M)/M, size);
Mean(1-A+A^2/(1+A))/M = (Mean(1)-Mean(A)+Mean(A^2/(1+A)))/M; is(%); subs(p = 1/3, `%%`); simplify(%, size); evalf(%)

Hello,

I would like to pass a string array to an external FORTRAN function, can this be done without generating wrapper code...I don't have a FORTRAN compiler...

The Fortran datatype is

  character*255 hf(20)

In FORTRAN I would pass say "hf(1)='nitrogen.fld'", but I'm not sure what datatype to use in the maple define_external function or how to pass the data in?