## Get rid of ugly anti-aliasing when printing worksh...

Hi,

I am running Maple 11 on Mac OS 10.5, and so I use the older Java Runtime Engine to get decent looking prints. However, whenever I print something using pointplot, all the points have this anti-aliasing that makes it look really bad, especially if you use something a little thicker like the diamonds.

I attached a pdf of a printout of a recent homework I did plotting out the Lorenz attractor using pointplot. I noticed that the 3D version at the end looks okay, but the 2D projections I did show you what the problem is. If you zoom in you can see the "shadows"

Is there a way to get all your printouts entirely in vector format?

## ODE system...

When I solve the equation

ode := diff(y(x), x, x) = t*y(x)+1

with

dsolve(ode)

everything is ok,

y(x) = exp(sqrt(t)*x)*_C2+exp(-sqrt(t)*x)*_C1-1/t

However, when I want to solve the system

## Convert Polar Equation to Rectangular...

Is there a way to ask Maple to kindly do this for me?  Perhaps if there is can the kind sir show me the steps?

I ask because I did this one by hand and maple would not implicitily plot it for me!

Thanks!!!

## problem with an equation passed from a procedure...

Hi

when i pass a pair of differential equations from a procedure (called expressions in the code below) to another procedure (main) I am unable to solve the equations with dsolve.

If I explicity include the equations in main I can solve it fine.

Does anyone know what I'm doing wrong?

below is the code that 1) doesnt work 2)does work

## Complex plot...

I want to plot the complex numbers

(-1/2)^q+(-1/2)^(1-q)  (0.25<=q<=0.5)

on the complex plane. Does exist a package (some commands) which can do it?

Sandor

## solving a problem...

there are n persons selected at random. the probability that at least two of them are born in the same day is p(n). i have to calculate:

a))   p(2),p(3),p(4)

b)) to establish a formula for p(n)

c)) to find out the values for "n" so that p(n)>0.5

if anyone can help me i would be forever grateful. i don't have no idea for this type of problem!

thanks!

## Products...

Hi guys

How do you calculate the tensor product of 2 matrices in maple? Can't seem to find this simple operation in the tensor library.

I'm new to Vista, and I'm trying to get a network copy of Maple 11 to load correctly. I've read about the open/save problem, so I tried to run the install file as administrator under Windows 2000 compatibility mode, but the installation wouldn't finish properly, so I installed normally. Opening normally, Maple now runs fine except for the open/save problem. Opening as administrator andd under Windows 2000 compatibility mode, the program stops working before it finishes loading. I don't know what to do, I need this program for class. Please help.

## matrix...

how do i solve a matrix ^ 10?

thank you

## How to map a 2-D surface on a sphere?...

Actually, I could just cut to the chase here...

I need to print out a 2-D ring and then attach that to a 3-D sphere.  The problem is that the 2-D ring will buckle as I attempt to attach the outer circumference of it to the sphere.

## Pattern matching in a sequence of digits...

This problem arised in a math forum.

I would like to check wether the consecutive digits of a given positive integer (n) are in the first 100000 digits of Pi.

For example the given integer (n) = 1592653 and this is in 3,1415926535897.... so the result is true.

I also would like to use this pattern matching for checking the type of a variable in a procedure:

myproc:=proc(n::mytype)
...end proc;

The procedure accepts n if n fullfils the condition above.

Hi, I have a trouble in handling MathML in worksheet published by MapleNet. A simple worksheet published on the following page works fine. http://mapleoracles.maplesoft.com:8080/maplenet/primes/worksheet/256_int_math.mw However, same worksheet published on my own MapleNet server does not work nicely. http://thomas.phys.cs.is.nagoya-u.ac.jp/maplenet/App/int_math.mw

I have found this problem somewhere in a math forum: somebody wanted to simplify this expression ( I write it in maple syntax:, this was not a maple forum):

a:=(1253*sqrt(2)-963*sqrt(3))^(1/3)+(26209+10500*sqrt(6))^(1/4);

They tried with the simplify command of maple, but it didn't work, and they tried with Fullsimplify command of the other famous math program , and it worked. ( I haven't tried it.) The conclusion was that Maple couldn't do this job.

Actually Maple can do this job with radnormal:

14*2^(1/2)

## Implicitplot: Extra unknowns error...

I am having problems using implicitplot.  I run this code and it worked and today I tried it again and it gives me the following:

with(plots,implicitplot);

implicitplot(0=int(erf(  (T-e*t)/sqrt(2)  )*t^2*exp(-t/2),t=0..infinity),e=0..1,T=0..10);

Error, (in plots/implicitplot) invalid input: the following extra unknowns were found in the input expression: {t}

The weird thing is that this worked before (took about 10min though) and now it isn't.  Any suggestions?

Thanks

## How do I enter a list into Maple TA...

I want to write some stats questions on forecasting. I would like to have a list which is a time series, and use Moving Average to derive forecasts, then calculate my errors, etc. I can do it all in Maple, but I don't know how to create a list in Maple TA. For instance, how do I create A in Maple TA's algorithm, where A is defined by:

A:= [seq(round(RandomTools[Generate](distribution(Normal(40,5)),1)), i=1..20)];

This is just a  list of some "sales figures" distributed approximately normally.