## command for random generator...

hi.. i want to ask about command for random generator.can you give examples of cammand to build programmning of generating new random generator.i deal with 10^12 of random variables. i don't have any idea to create the command for this random generator.can you help me?please..

## Gauss elimination in Maple...

Hello, Given a system of differential equations as: C*V = O; where O is a null matrix and C is a 3X3 matrix as follows: Row 1: [rho*(alpha*I+omega*U*I), rho*U', alpha*I] Row 2: [0, rho*(alpha*I+omega*U*I), d/dy] Row 3: [alpha*I, d/dy, M^2*(alpha*I+omega*U*I)] The prime in Row 1 denotes differentiation with respect to y, and I is the unit imaginary number, d/dy is a differential operator. The vector V is given by: V = [u; v; w]; How do I use Maple to do a Gauss Elimination on the coefficient matrix which will give me separate equations for each of u, v and w. Or to be more specific, how do I represent the differential operator d/dy in a matrix

## Maple11 in Microsoft Virtual PC 2007...

Has anyone tried installing Maple within WinXP installed as on OS in Microsoft's Virtual PC 2007 running in Vista? It seems like it should run just the same as it would in normal WinXP. I've run Win98 in the Virtual PC 2005 running on WinXP Professional with no problems. This would allow Maple to run on the same system as Vista, even though it wouldn't make use of anything relating to additional RAM, additional CPU's, or whatever. Flipping between the two is very easy and it's even possible to share files between the native OS and virtual - at least with Virtual PC 2005 in case one wanted to do something with Maple output files within a program running on Vista.

## why am i getting an empty plot?...

I am solving and plotting mechanical spring vibration problems, and I keep getting an empty plot for this equation: y''+4y=2cos2t, y(0)=0,y'(0)=0. Here is how I entered it. Any help would be greatly appreciated. Thanks. e2:=(diff(y(t), t, t))+4*y(t) = 4*cos*t; s2:=dsolve([e2, y(0) = 0, (D(y))(0) = 0]); r2; rhs(s2); plot(r2, t = 0 .. 10); Error, empty plot

## random data...

hi, i want to ask about random data. i have a set of randoms data.how can i compile the data into the interval that has fixed.after that i want to plot the histogram by using that randoms data.can you give me an idea to create that histogram. for your information, i have more than thousand random data.i have no idea to program the histogram. thank you..

## Maple Map Function...

Can the maple function map, just be considered as performing a composition ? v/r,

## How do I unpack .lib files?...

I have a .lib file, and I want to unpack it to read source files in it. What should I do?

## How to union a new Matrix?...

I have four Matrix A,B,C,D.How can i union them together to form a new Matrix E like the follows? E:=(A,B) (C,D) E is a block Matrix formed by A,B,C,D. waiting for your help!thanks!

## Maple 11, 10, 9,.. do not work under Vista. Mathe...

by: Maple
Maple 11, 10, 9,.. do not work under Vista yet. After a tricky installation, File Open and File Save do no work. Mathematica 5.2 and Matlab 2007 run with no problem in the same environment. I would not rush purchasing any version of Maple if it is going to run under Vista.

Hello all, I'm having a lot of trouble using the shading function. I'm trying to shade a circle a particular color but there is always an error. I found this website but I didn't figure out how to do it myself: http://www.indiana.edu/~statmath/math/maple/plotting/index.html I'm making a picture of a cartoon and my plots are all finished but the shading part is throwing me off; when I put in filled=true instead of filling the circle it makes a box the size of the radius on top of the circle. Can anyone help me?

## is(...) / if with assuming......

From the forum message  HERE , I learned about both  is(...)  and  assuming...  and became interested in how they work together as compared with the way that  if  and  assuming...  worked together. Finally using the combination of  if  and  assuming...  to find the place at which  n of  x^2-n  needs to be within a range of .1 to 1 with a resolution of  .01 and with x=-1..1

## elliptic PDEs...

Hi can we solve elliptic PDEs in maple 10.I have the laplace equation of 2 dimension