## maple for PDA...

Hi, i'm new using Maple and the little bit I've seen has shocked me, i love the grafics and the fast it is, Now, i want to buy a Palm or a Pocket PC, but i wonder if there exist any version of maple that works with this operative sistem, if you know please answer my request hahaha, or if you know some other program that do the same as do the maple, but for a PDA, thanks a lot

## Problem with Evalf...

Hello,

I am a new Maple-user and i am experiencing a problem. When I type: restart;a:=sin(Pi/8);evalf(a,2) I get the wrong answer: 0.36! It should be: 0.38.

But when when I type: restart;a:=sin(Pi/8);evalf(a,3) I get 0.382, which is better but still not entriely correct: it should be 0.383.

What is going wrong?

Greets,
Jan

## Evaluate the frequency of a processor...

I'm currently working on a school project, the issue is to find approximately the speed of a processor. I made a script which gives the time necessary to calculate a big factorial (10000! for instance). This time (gived by the function time()) is the total CPU time needed to calculate this factorial. But know, I need to know the total number of processor cycle per instruction (CPI) necessary to calculate the factorial. I explain : maybe you already know that the processor run by cycles which has a link with the frequency of the processor. If i can evaluate the number of processor cycle necessary to make a multiplication or the calculation of a factorial (even if this number is approximate) I would be able to find the speed of my processor.

## Listing strings of length n composed of k given el...

Hi I have a problem. As you know the number of strings of length n, composed of k given elements is k^n. I want to list all this k^n strings. For example if the length is 3 (n=3) and elements are choosing from {0,1} we obtain: 000 001 010 011 100 101 110 111 Actually, for n=3 the solution is simple: ```B:=[0,1]: for i from 1 to nops(B) do for j from 1 to nops(B) do for k from 1 to nops(B) do print(B[i],B[j],B[k]); od: od: od;``` I need a code working for all n any idea? Emrah AKYAR Anadolu University Faculty of Science Department of Mathematics

## Elasticity maple ?what ?!...

ok back again ! can maple do elasticity ? and cross elasticity let say I have,like the other example I use all the time. d(pc,pt)=2000+1000pt-2Pc and s(pc)=23pc now how can I do the cross- elasticity?(or do I just say the elasticity) of d(pt,pc) against pt. knowing that pt=4 and that pc=2. thank you very much ! peace ! p.s. : if you need more info please do tell.

## elliptic partial differential equation in Maple,...

by: Maple
Hello i wonder whether its possible to solve elliptic pdes numerically in Maple10. I didnt succeed. I have a 2dim. poisson equation with the source term being the output from an other pde, i.e the source term can not be given in closed form so how to integrate this? i always get the message that Maple10 can not solve elliptic pdes Thanks for any ideas

## how to use numerical method like runge kutta to so...

Hi, I am trying to find a solution to this following maximization problem: pi[a1]:=Q*log(t)*(e[q]) - ( P*(1/log(t))*(1/(1- (e[q])))) - log(y)*log(t)*(e[q]*s[q]+(1-e(q))*s[p]); maximize pi[a1] with respect to t and e[q]. I tried analytical method but it seems that there is no closed form solution. pi_a1[diffwrtp_t]:=(diff(pi[a1],t)); pi_a1[diffwrtp_eq]:=(diff(pi[a1],e[q])); solve({pi_a1[diffwrtp_t] =0, pi_a1[diffwrtp_eq]=0 },{t, e[q]}); Can someone please advice me how to solve the differential equation stated above so that I can find a relationship between t and e[q] and t and y.

## Help with printing...

Hello, I'm still a new user and I have been unable get MAPLE to print with a result that looks like the original MAPLE file. I know the solution is probably something simple but I can't figure out what it is. I have just uploaded 2 files; GeorgePaper1.mw and GeorgePaper1.pdf. The latter is a file printout of the former. I'd sure appreciate it if someone could take a look at these 2 files and tell me what I'm doing wrong. -Thank you.

## upper limit on "delay" options for plotter?...

When using the Plotter element in a Maplet, one of the options is (copied from the help file): delay = posint The delay in milliseconds between frames. The default value for this option is 100. So far, if I set this above 1000, the animation will not play. 1000 works and anything below it. Does this mean I cannot have my animation play slower than one second intervals between frames? If this is the upper limit, does anyone have a suggestion for how to get around this? One thing I was thinking was using the Student[Calculus1][ApproximateInt] command (this is what I'm animating) with the partition value set at different intervals corresponding to a function, t, 2*t, 4*t, etc., just like the actual animation does. But I could have my plotter updated manually using a time delay function that Will gave me previously on here. That's a lot of extra code, though; delaying the plot speed even more would work much better.

## Programming If then elif else...

Hi all,

I'm having a dickens of a time trying to get the following simple conditional statement to work:

> restart;
>
>
> p := 6;
> q := 8;
> delta := 4;

> if ((q>0) and (p<0))then print(Node)
elif((p=0) and (q>0))then print(Center)
else print(Spiral)
end if;

Error, Got internal error in Typesetting:-FI : "'_Inert_DELAYBOOLEAN' is not a valid inert form"
Typesetting:-mambiguous(if ((qgt0)and(plt0))then printApplyFunction(Node)

After I compute the values of p,q,and delta I want a ptinted line to tell me the type of Critical Point I have. I am using Maple 10 Student with WIN XP Pro

## How to solve the problem of least square ?...

i need to solve the equation in method in least square; i have one equation e.g.f(x)=a*x^2-b*x-c, but i need use it two times in one equation,like g(x)=f(x1)-f(x). f(x1) put the value x1 in equation f(x),the behind is not change.so the equation like this : a*x1^2-b*x1-c-a*x^2-b*x-c if i input the equation g(x):=f(x)-f(x)the input the value a,b,c.got the 0. it's not my need. who can tell me how to solve the problem?

## Visualization of a linear system of more than one ...

Hi people, I would like to know how to obtain in maple (to add this in a variable in mapleTA) the next thing: a system like this: {x+2y=0, x+4y+3z=5, x+y+z=0} in a good presentation way, I mean, If I do MathML:-ExportPresentation({x+2y=0, x+4y+3z=5, x+y+z=0}) and I use the resultant code in mapleTA, I obtain the system in a inline way, but I want it like this: x+2y=0 x+4y+3z=5 (here a big "}" englobing all) x+y+z=0 How is it possible using only maple? Thanks

## Generating unevaluated MathML...

I want to generate MathML code. I'm using Maple 9.5. However I want the generated code not to evaluate the expression. For example:

> codegen[MathML](5^4);
<math xmlns='http://www.w3.org/1998/Math/MathML'>
<semantics>
<mn xref='id1'>625</mn>
<annotation-xml encoding='MathML-Content'>
<cn id='id1' type='integer'>625</cn>
</annotation-xml>
<annotation encoding='Maple'>625</annotation>
</semantics>
[/itex]

while what I want is:

<math xmlns='http://www.w3.org/1998/Math/MathML'>
<semantics>
<mrow xref='id3'>
<msup>
<mi xref='id1'>5</mi>