Greetings,

I want to solve the non linear recurrency system:

x[1](k*T+T) = x[1](k*T)+2*u[1]*psi*cos(alpha); x[2](k*T+T) = x[2](k*T)+2*u[1]*psi*sin(alpha); theta[0](k*T+T) = theta[0](k*T)+T*u[2];

with:

psi := piecewise(u2 <> 0, sin((1/2)*T*u[2])/u[2], (1/2)*T); alpha := theta[0]+(1/2)*T*u[2];

and u1 and u2 some functions of x1(kT) and x2(kT).

I tried to use the rsolve command but didn't work.

Can you help me, please? Is there some way to solve this?...

ex1 := {
evalDG( d(x) = w1*e1 + w2*e2),
evalDG(d(e1) = w12*e2 + w13*e3),
evalDG(d(e2) = -w12*e1 + w23*e3),
evalDG(d(e3) = -w13*e1 - w23*e3)
};
ExteriorDerivative(ex1);


> ex1 := {evalDG(d(e1) = w12*e2+w13*e3), evalDG(d(e2) = -w12*e1+w23*e3), evalDG(d(e3) = -w13*e1-w23*e3), evalDG(d(x) = w1*e1+w2*e2)}; ExteriorDerivative(ex1);
{d(e1) = w12 e2 + w13 e3, d(e2) = -w12 e1 + w23 e3, d(e3) = -w13 e1 - w23 e3,

  d(x) = w1 e1 + w2 e2}

Hello,

Is there a way to export a file from Maple so that somebody without Maple can use ? My project is a dynamic one with components that need to be used by the "Reader".

Thanks,

Yaad

Hi,

I have a rather large output of quotients of polynomial terms in Maple, things like coeffiencient*r^6*(sqrt(1+r^2...)/(1+r^2+r^4), what I have to do at the moment is scan through them by eye taking the large r limits, to see if e.g. an expression goes like 1/r, or 1/r^2 etc at large r..

I was wondering if there is anyway I can automate Maple to scan through the terms for me, systematically taking each limit, and only keeping terms to a certain power in r?

What is the equivalent of

Shift+Tab = move the cursor to the previous region

on linux?? it is listed as working on windowns/macs but not on linux.

Also is there a way to customize keyboard shortucts? I am a vim user and navigating around a document in maple's gui is really painful (by the way I work in the "worksheet" mode)

thank you.

I try to solve the following, but it have the error of singular. can any one help me solve it.

> restart;
> dsys1 := diff(y(x), `$`(x, 2))+(lambda*lambda)*y(x) = 0;
              / d  / d      \\         2        
              |--- |--- y(x...

I have two expression like,

exp1:=A1*x*(k-p*x)+A2*x+A3*p+A4

exp2:=A5*x*(k-p*x)

where A1, A2, A3, A4 and A5 are some lengthy expressions.

I need to find the division of these two, namely exp3

exp3:=exp1/exp2

in the form

exp3:=(A1/A5)+the rest

In other words, I need to extract the part which could be normalized by x*(k-p*x).

I need to know how to use Maple to solve group permutaions and Cayley tables

I wanted that the same X-axe represents 1-10, 100-110 and 500-510. I do not know if it is possible to have a kind of X-values that in the same graph shows  the Y-values for the 32 following points: 1,2,..9,10,100,101,..110,500, 501,502,..., 510 . If I consider all interval 1-510, I could not be able to apreciate the graphic.

Thanks for your attention Kirnyk.

Jean-Jacques

I'm trying to understand shooting method using maple in solving BVP. especially to solve boundary layer flow. I don't have any idea about the step size used and convergence criteria specified in shoot lib in the maple. Can anybody help me with this? Where can I refer to. Thank you

Could you give examples of differentiate differential form or integrate differential form using maple?

A friend asked me if Maple can do the following integral, since Mathematica just spins for an indefinite time with it:

int (  (1/sqrt(2*Pi))*(1/(1+exp(x)))*exp(-(1/2)*((x-a)/b)^2) ) from -infinity to infinity

Interesting integral though!

Dear friends,

The commands below generates a graphic. Hower I would like two things:

1. That the Y values are from 0 to 0.7 (in the example before it goes --by default--only until 0.5).

2. To represent in the X-axe the values from from 1-10, 100-110 and 500-510. I do mean, axe-X excluding 11 to 99, 111 to 499.

Here the commands:

restart:
ww:= [seq( [n, add(1/(n+1), k=ceil(1/3*n)..floor(2/3*n))], n=1..10)]:
plot(ww, style=point):

I have 2 sets of nonlinear motion equation for double pendulum problem. I wonder how can I solve these second order nonlinear equations first and second how can I extract the state space model for this system.

Thanks in advance

I have a DLL which contains many function for the 1997 IASM steam tables.

As an example (in SI units)

> dllloc := "c:/Windows/system/astemdll.dll";
                      "c:/Windows/system/astemdll.dll"
> psat := define_external(psat97mc, FORTRAN, arg1::(float[8]), RETURN::(float[8]), LIB = dllloc);
> b := psat(647.096);
   ...