## Calculate implicit surface volume...

Given an implicit representation of a 3D surface, for example: 1 = 3/(z^2+3)*exp(-1/2*(3*y^2+2*x^2+x^2*z^2-2*y*x*z-12)/(z^2+3)) does Maple have a function to numerically integrate its volume? I was hoping to avoid the nuisance of computing the bounds on x,y and z myself and then performing the triple integration (I tried this, but the third integral hung Maple up...I gave up after it ran for 24 hours). The implicit plot seems to work fine, which shows a nice blob. This should be fairly easy to integrate... Thanks, Matt

## Saving modules to a Library...

Hi, I use maple 10 under linux (red hat). In a file ABO.mw I have created a module that has a structure like: Mymodule := module() description \"procedures for Quantum Mechanics\"; export DP, deltaK; option package DP:= proc(...) etc,etc end proc; deltaK:=proc(..), etc, etc end proc; end module; When I execute the group and then type: with(Mymodule); the procedures appear. I would like a library containing this module to be automatically loaded upon startup so I can call it with with(Mymodule); whenever I start a new worksheet.

## Definite integration of a spline function...

Hi there, I'm trying to integrate some experimental data. I'm sure that what I'm doing is not the best or most convenient way, but I think it should work. I read the data in using the import assistant, which put it into a 2d matrix. I then manipulated that matrix. This is heat capacity data (for those of you familiar with physical chemistry), and I'm baselining the h.c. data to zero before I integrate it. This hasn't presented any problems for me, and it (seems to) give the expected result. When I integrate this baselined data, however, the integrated curve (enthalpy) at low values of x is not close to zero; it is much bigger. The integrated curve's topology is what I'd expect, it is horizontal at small x values. It is just off of zero by some (large) constant. My data starts at about 300, ends at 360.

## fibonacci prime number?...

How do it find fibonacci prime numbers using Maple?

## Weighted standard deviation gives wrong answer?...

Okay, I know Maple's not giving the wrong answer...I'm sure I'm just asking the wrong way. When I ask for the standard deviation (Statistics:StandardDeviation) of a list of individual data samples, I get the expected answer. However, when I provide a list of values and a list of frequencies, I don't get the answer I'm expecting. Hopefully the attached worksheet will make my problem obvious. View 1058_std_dev_problem.mw on MapleNet or

## Updating a MathML viewer continuously...

Hi, I'm trying to set my MathML viewer to update constantly, as a certain animation in a plot changes. I would either need some type of "time delay" device since the animation works by millisecond delays (which I am able to control), or some type of animating function that isn't for plots, but for procedures. Basically, I am looking for a way to use Set or SetOption over and over again, at specific intervals, without having to click a button or perform a certain action each time the option changes. Thanks for any help.

## Graphing more than one set on the same graph with ...

Is there any way to plot more than one pointset on the same graph using pointplot. On my worksheet the following worked plotpoint(points,color=red); plotpoint(points2,color = blue); But not plotpoint({points,points2},color = [red,blue]); or plotpoint([points,points2],color = [red,blue]); Any suggestions?

## 2 variable ?...

ok me again, I have this economic problem. Dc( pc , pt ) = 2000+1000*pt-2*pc Sc (pc) = 23*pc how can I plot this, and If I don't know what the value of (pt), can I still plot this? thank you so very much in advance.

## Economics...

how do I find the value of (p) that will make an equation equal to an other. ex: D(p):=82-0.75*p and S(p):=1.3*p how do I make maple find the answer. ( I know its way more easy by hand, but I would still like to know). thank you ! Jp

## A graph drawing problem (networks package)...

I'm just trying to draw a Petersen graph with one vertex removed, using Maple 10: ```with(networks): P:=petersen(): Q:=duplicate(P); delete(1,Q): draw(Q);``` I don't see anything wrong with these commands, and yet I get an error message: "Error, (in draw/concentric) not a list of vertices [1,2,3,4,5]" Yes, I know that - I've just deleted vertex 1. But surely I should still be able to draw the resulting graph? I know I can fiddle about with "Concentric", but I don't want to... And another thing: the inplace implementation of "delete" is, I think, contrary to reason. I would rather have:

## How do I draw a triangle along with other vectors ...

Does anyone know how to draw a triangle in 3 space with three points? Also, I need to plot 3 vectors on the same graph. Thanks

## Can maple be taught to differentiate polynomials w...

Dear All, I'm working on a problem in differential equations where I need to compute the n-th power of a differential expression. Can Maple be taught to differentiate polynomial functions without carrying out the multiplications / simplifications that it usually does? For example: diff(-2*c/x^3,x); gives the answer 6*c/x^4. I want it to return: (-3)(-2)*c/x^4. Ideally, I also do not want it to simplify sums of such results. Thank you very much, I appreciate your help! Andrea Bruder