Dear all,

I'm currently facing the following problem. I am trying to solve an expression for 4 variables: Fe11, Fe12, Fe21, Fe22. Actually these variables come from a 'deformation gradient tensor' Fe that is used in continuum mechanics.  This tensor actually appears in two equations in tensor-form. Since these tensorial equations contains 'inverse' and 'transpose' operators, the only thing I could think of to solve for a particular tensor (Fe), is to do this component-wise....

I am just learning Maple, but have plotted several parametric curves.  However, the attached code is giving me an error message that seems to be saying that my indices for the two elements of the curve vector are out of range.  I don't see why.  Can you explain?

Here's the file:  NewtonLeastResistanc.mw

Thanks for any help!

It's a simple question, but I could not find a hint in the help system.

In economics it is very common to name variables like Y*, π* etc. They are unique, e.g. Y* ≠ Y

How can I enter them? If I just do it, it is interpreted as a vector function.

From time to time, you even need variables that have an overline (or bar),  above the character in addition to the asterisk, or variables like Â*.

A similar problem are variables that are named y' ...

The "." notation for the dot product of Vectors is very convenient and intuitive.  For example:

> <1,2,3> . <1,1,1>;

6

One sometimes annoying feature of it, however, is that by default Maple is using a dot product (suitable for Vectors with complex scalars) that is conjugate-linear in the first argument.  But let's say you will only be working with real scalars.  There's no problem if your Vectors have numeric entries, but...

Let's say if given a expression y(x)=1/x+sinx, how to find the equation which y(x) satisfies by using Maple?

The variable A is a matrix in Maple. I need to show A, A^2, A^3, ....., A^19, A^20, and that i do by making a for loop:

    for n to 20 do A^n end do

And it works and shows correct results.. 

But i want to show more than just the result of each step in the for loop. 

The result right now is without variable name etc. How can i show more than just the result ? ... 

I have changed the Typesettinglevel to extended.

Dear Forum

I'm trying to evaluate the following expression:

The value of the integral should equal 1 and from that the value of the normalization constant N can be obtained. It should equal sqrt...

 Hi all,

I'm trying to use the geometry module. I tried the following code:

> with(geometry);
> point(A, xA, xB);
A
> point(B, xB, yB);
B
> line(AB, [A, B]);
line: One of the following conditions must be satisfied xA-xB <> 0 xB-yB <> 0
Error, (in geometry:-line) not enough information: the line is not defined

As you can see, maple is unable to create the line object since the two points can be the same....

I am planning to buy a new graphics card to use the CUDA support of Maple. I have some questions:

1. I have two choices: A professional graphics card (PNY Quadro 600 1GB GDDR3) or a "normal" (or gamers') card (ASUS ENGTX480/2DI/1536MD5 1536 MB DDR5 384 Bit or MSI N570GTX-M2D12D5 GTX 570 1280 MB GDDR5 320 Bit). Which one would be more efficient for the Maple usage?

2. Are there any symbolic procedures that use the GPU in Maple (or...

I'm trying to set up a "while" loop involving Newton's Method without using the Newton command. I'm leaving something out since the loop values aren't changing. This is what I have so far:

Error:=1;

x:='x';

DesiredError:=1.10^-30; (this is my error tolerance)

x_(1):=1.5; (this is my initial guess)

for n from 1 to 20 while (Error>DesiredError) do

 x_(n+1)=x_(n)-(p(x_(n))/p'(x_(n))):

 evalf(%):

Hi there,

I am using the bodeplot function to plot three transfer functions, and for this I need to specify each one with a different color set. I can use the color="blue", but that assigns all the transfer functions to blue. How can I differiante between them?

Impedance_plots_afte.mw

Dear Primers

I have an exponantial equation of the form below:

eq161 := 1/2*alpha^4*(-2*exp(-1+1/2*(4*alpha^2+1)^(1/2)+1/2*(-4*alpha^2+1)^(1/2))*(4*alpha^2+1)^(1/2)+2*exp(-1+1/2*(4*alpha^2+1)^(1/2)-1/2*(-4*alpha^2+1)^(1/2))*(4*alpha^2+1)^(1/2)-2*exp(-1+1/2*(4*alpha^2+1)^(1/2)-1/2*(-4*alpha^2+1)^(1/2))*(-4*alpha^2+1)^(1/2)+2*exp(-1-1/2*(-4*alpha^2+1)^(1/2)-1/2*(4*alpha^2+1)^(1/2))*(-4*alpha^2+1)^(1/2)+2*exp(-1+1/2*(-4*alpha^2+1)^(1/2)-1/2*(4*alpha^2+1)^(1/2)...

I have been trying to obtain a 3D plot of f9x,y)=(x+y)e^(-x^2-y^2) and it keeps outputting  "warning unable to find numerical values for the in the region....blah blah blah"

Here is my call sequence

> plot3d((x+y)*e^(-x^2-y^2), x = -1.7 .. 1.7, y = -1.7 .. 1.7);
Warning, unable to evaluate the function to numeric values in the region; see the plotting command's help page to ensure the calling sequence is correct

Anyone know what to do? ...

Can I install both 32 and 64 bit version on one PC? (64 bit in Program Files and 32 bit in Program Files (x86))?

If so, does it mean  I will need to use a second license? Not a problem, my Office version is 32 bt and have Maple 64 bit installed and I want to use Excel.

Download problem_for.mw

I use some codes to find the coefficients of given functional expressions. But in the procedure of operation, "Error, invalid 'if' statement" is showed. How can I do to solve the error?
If this structure of code can't find the coefficients, how to get the coefficients?

P.S. the coefficients of given functional expressions like this:

given Ex:=a*x+b*y-d*z+e*y-f*x-m*z,