## Newbish question, issues with plots[multiple]...

Running into this problem, im trying to graph concentric circles (think planets) with a set radius and a set amount of time used to complete one orbit. I am using parametric equations with t being a value of time in terms of one complete orbit. However, when I try to graph these circles using plots[multiple] I get error codes. Heres my text~ We have our 5 planets, A - E orbiting around the sun affixed at the origin. We can easily graph these together to give us an idea of the orbit and time required to complete one. > plots[multiple](plot, > [0.71 cos(2.985074627 Pi t), 0.71 sin(2.985074627 Pi t), t = 0 .. 67],

## Gauss elimination for band matrix...

i have a program to write and i dont know how to do it. if anybody could hwlp me cheers. Q implement a computer program which fora given positive integer n, a given square matrix A of order n and given vector b which n components, decides whether A is a band matrix with p=2=q and in the positive case solves the system of equations Ax=b by simplification of Gauss Elimination for a band matrices with p=2=q

## Why does ifactor work so quickly?...

Please could somebody explain the process Maple uses to factor integers so quickly? Thanks Matthew

## What Happened?...

What happened to my post in this thread; http://beta.mapleprimes.com/forum/maple-doesnt-find-solution-but-plots-the-solution#new I used the HTML conversion tool to upload a worksheet. When I enter the page now, I can download the worksheet, but the in-line all I see is alternating Bold and Normal text saying "Maple Equation". Am I the only one to see this, or has my upload failed? Does this have anything to do with the New Mapleprimes Filemanager MapleNet implimentation? I've also got a signature, but do not see it after my comment? What have I done wrong? Thank you!

Hello everybody, I have Maple 9.5 and Excel 2003 on my laptop. Unfortunately, I always get a runtime error 53 when trying to load the Add-In, telling me that the manager cannot find the Add-In although it is loading the toolbar for Maple within Excel. Can somebody help me solve the problem? Is there a patch available for this? Cheers, Fox

## Volumetrix 3d plots in Maple...

HI. I hope anybody can help me. I have in parametric form a volumetric element in space: >restart: >A:=(r,theta,phi) -> [r*sin(theta)*cos(phi),r*sin(theta)*sin(phi),r*cos(theta)] where: r in [1,3], theta in [Pi/4,Pi/3], phi in [0,3*Pi/4] I know want to plots this as an volume element in maple if possible. This means, that every surface has a grid. Can anyone help me with this one? I only seems to be able to plot planes i maple? //Sentinox

## How to dislay few phaseportraits...

If I have two different plots constructed with plot command I can display them simultaneously: > F:=plot(...); G:=plot(...); display(F,G); However, if I try > with(DEtools): F:=phaseportrait(...); G:=phaseportrait(...); display(F,G); Maple 10 returns an error that display requires plot! Is there a way to display simultaneously two phaseportraits? Thank you in advance Victor Ivrii

## Very long runtime for that integral - why?...

The following seems to run endless (WinME, M10.02 classical interface): Int(2.9992571251988*(kappa-.89988751406074)/Pi* exp(3.3571035419740-12.0624756920228897*ln(kappa))* BesselK(1,26.1571648648044217*(.13147587176957e-1+(-.57683186342273e-1+ln(kappa))^2)^(1/2))/ (.13147587176957e-1+(-.57683186342273e-1+ln(kappa))^2)^(1/2)/kappa, kappa = .89988751406074 .. 4.0); evalf(%); I did not want to massage it by hand (as the fct may change and actually I want the upperbound to be infinity). The reason can not be the slow numerics for Bessels (as an external DLL with brute callback gives the result slowly,

## shooting down Maple through long expressions?...

That kills my Maple ( M10.02 on WinME)

restart; _EnvExplicit:= true;
Eq:=0 = 'mu + delta*sqrt(alpha^2-Theta^2) - sqrt(alpha^2-(Theta+1)^2) ';
[solve(Eq, Theta)]:
sols:=%;

giving the system message:

CWMAPLE verursachte einen Fehler durch eine ungültige Seite
in Modul CWMAPLE.EXE bei 017f:00459d0b.
Register: blablabla

If I prevent output by "sols:=%:" (using a double point) it is ok and one
sees that it would produce ~ 5000 pages ( = length(sols)/80/60 ).

Could be that one reason?

## How to run a funcion using Maplet Builder?...

I want to call a procedure or function by clicking a button. How to call a procedure from Maplet Builder: Evaluate -> function? And where I have to write this procedure: to save it - in Maple 10 worksheet like file *.m in the same folder where file *.maplet is?

## Problems in Converting from linalg to LinearAlgebr...

I am converting a complex worksheet from linalg to LinearAlgebra, and discovered what is to me a serious problem. With linalg, one could use the basis(A,colspace) command to give a basis of the column space consisting of columns from the original matrix, guaranteed to be in the order in which they appear in the matrix. This is useful in extending a spanning set of a vector space to a basis of a larger space, and allows one to determine exactly which new vectors need to be added. However, the ColumnSpace(A) command in LinearAlgebra does something quite different. It gives a basis of the column space which does not preserve this order, and does not even use the original vectors.

## Matrices...

I have two matrices, and I want Maple to test and see whether they are different to each other (as part of a for to while loop -i.e. it will keep looping until the matrices are the same). However, even when they are identical, it returns a value of true to evalb(A <> B). What can I do?

## Xmaple on Fedora Core 4 64bit doesn't start

by: Maple
hi everybody, I tried to install Maple 10 on my AMD64 Athlon 3200+ (running with Fedora Core 4 64bit Kernel 2.6.15-1.1831_FC4). Well, the installer worked just fine, except the activation - unable to determine Host ID. So I activated Maple offline. After the installing, the first problem I had to handle with was the "read only" mode off all installed executables - I think I changed the mod off all executables in the maple 10 folder... Now I was able to run the command line mode of maple. But I am still not able to run Maple in X11 mode - when entering ./maple -x or ./xmaple nothing happens, no error - nothing. Since Maple is working in the commandline mode, I assume that it has to do with java somehow. Well, I am not really an experienced Linux user, but I installed jdk-1.5.0-06, hoping it will solve the problem, without success :-( . I now that Fedora Core 4 is not supported, but I don't see why Maple should not work properly here if it does with redhat. Well, it would be really great if somebody has a solution to this problem.