## Matrix problem...

I have the following matrix problem that I am having trouble with. I have the following equation. A-1 * C * D * A * v = v A, C and D are of the same order. A & D are diagonal matrices. D is a diagonal matrix with values that are the row sums of matrix C. I get answers that are reasonable in some instances and zeros in others. I have uploaded a Maple file with what I am doing with some data. Would appreciate help. Thanks. Brian Download 2031_Matrix problem.mws

## Latex...

Simple-simple......How do I get the LaTeX code for an input equation? If I type in the derivative of x squared, right click and select Conversions>LaTeX I get the LaTeX code for the output, i.e. for 2x, not for the derivative of x squared. Thanks!

## PDSolve, Error: duplicated elements (ranking)...

Hello! I have some trouble with getting an explicit solution to a PDE: f=f(u,v) in IC^4 (IC=complex numbers) So i have a system of 8 equations, first order, integrable (i.e. solution exists by theory). I'm getting the following, when calling pdsolve(PDE, fcns), where PDE is the set of the PDEs and fcns are the 4 complex functions f[i], i=1,2,3,4: "Error, (in pdsolve/sys) duplicated elements (ranking)" What could it be? Thx, yadaddy.

## Continuum Mechanics, Indicial Notation Question...

I am using the new Physics package for Maple 11 to do indicial calculations for a continuum mechanics problem. I need two sets of coordinates for Lagrangian and Eulerian frames. In Maple, I have defined two sets coordinate (X and Y) each with dimension equal to three. Summation is not performed over the time variable, which is treated differently. If, X is a point in Eulerian frame, it is related to the Lagrangian frame (Y) by: X=X(Y,t) How could I calculate "X[k],K" ? Where the smaller index is in Eulerian coordinates (X), the capital index is in Lagrangian coordinates (Y) and "comma K" (,K) denotes the derivative of X[k] with respect to Y[K]. Could someone show me its implementation using the d_ command.

## Permutations...

Hi, I was wondering if anyone knew how to make MAPLE (10 that is) to diplay all the permutations of a certain number, say 1100 with each digit in a position in a vector. I can only work out how to make MAPLE work out the permutaions- and nopw how to put it into a vector. Also, the permutaions recognise the two ones and zeros as different numbers, when I don't want that. So for the example 1100, I would want MAPLE to output (1,1,0,0) (1,0,1,0) (1,0,0,1) (0,1,1,0) (0,1,0,1) (0,0,1,1) Can anybody help me with this? Thanks, Steph

## Plot regions with procedure...

Hello, Could anybody please tell me how to plot regions using a procedure in maple. Specifically I have a procedure f of two variables that can output an integer between 1 and n. I want a 2 dimensional plot that gives a different color for each value of this procedure. Any help is much appreciated -- thanks. PS: As an example I tried this: > g := proc (x, y) if x <> plot3d(1, x = 0 .. 2, y = 0 .. 2, color = g(x, y)); But this results in the following error: Error, (in g) cannot determine if this expression is true or false x

## nth Term problems......

Does Maple have any functions that would help to work out nth Term series problems where I'm giving a series of fractions and I need to determine what the nth Term is before I can start working the problems? Thanks,

## Working with Tables...

I hate to keep comparing but its all I know so have to compare to something. In Mathcad I can drop a table on a worksheet and fill it with values. Then use those values in an equation or plot. I can also take a series and fill a table based on operations of that series. ie: 1..5 and have it fill a visual table that I can review the values in. In Maple, when I've messed around with the table() function it ends up putting code on my worksheet and I have to double click it to see what is in it. Is there some easier method to work with tables of values that works more like Mathcad? Thanks,

## How do I plot this?...

I can plot things like this very easily in Mathcad but continue to run into problems with Maple. Mostly just habits I need to change but can't quite figure this one out. Hoping one of you guys can help me along. I have a problem with the following command: plot( (-1)^n + n^3 / n^3 +4n^2 + 8, n=1..infinity ); I've tried a smaller range on n but all I seem to get is a blank grid. Thanks, glenn

## export animations...

Subject: export animation ---> beamer / pdf? is in the newer releases "animated gif" still the only option for exporting MAPLE animations? if so, what is the best way of getting this into a beamer (via latex/pdflatex and acroread) presentation -- prefer- rably portable to any machine that has acro-read installed (want to bring the talk on a memory stick, don't bring the laptop -- yet not worry about installed helpers). so far my pdflatex accepts in beamer mp4 movies, and I can convert single frames of gif to pdf, but not animations.

## animate listlist plot...

I was wondering if there is a way to animate a plot composed of points from a listlist. The points are x/y cordinates read from a file and then placed into a listlist for plotting. In other words, I'd like to use the animation controls to animate the drawing of the plot shown below. ```tListList := [[2.3, 1.1], [3.4, 2.3], [4.3, 5.6], [5.3, 6.7], [7.2, 8.9], [12.4, 2.5], [13.4, 12.5]]: with(plots); with(CurveFitting); tSpline := BSplineCurve(tListList, v): plot(tSpline)``` ## maple animation in power point presentation...

I've made some animations in maple that I could like to show in a power point presentation. Does anyone know how this is done most easily?