Hi there, here are the commands: > y[1]:=exp(1)^(-(1/2)*(u[1]^2+u[2]^2)); > y[2]:=arctan(u[2]/u[1])/(2*Pi); > a:=diff(y[1],u[1]);b:=diff(y[1],u[2]);c:=diff(y[2],u[1]);d:=diff(y[2],u[2]); then it begins > a*d-c*b; g:=abs(simplify(%)); i got the funny "Re" thing in the expression why it didnt give me the answer as I would expected if I use the following command? > a*d-c*b; g:=-1*simplify(%); that's what I wanted the idea is I want the absolute value of the simplified answer ( simpify(%)) what's the difference here?

convert( (z)_n, GAMMA)  does not give the desired  GAMMA(z+n)/GAMMA(z).

Instead of Maple gives the answer   (z)_n.

How could I obtain the GAMMA form?

Thanks,

                   Sandor

Hi, I got to several funtions as follows: U[1]:= ( -2 * ln(Y[1]) )^(1/2) * cos(2*Pi* Y[2]) U[2]:= ( -2 * ln(Y[1]) )^(1/2) * sin(2*Pi* Y[2]) for Y[1] and Y[2] in (0,1) I want to find the range for U[1] andU[2] how do I plot them? Thanks Casper

In Maple11 odeadvisor does not know the Euler type differential equation.

For example, R(r)+ r R'(r)+r^2 R''(r)=0.

It is the same situation in Maple12?

Thanks, Sandor

We have the following situation.   An assignment whose finish date has passed is locked and if (for instance) one tries to edit it one is told that there is an active user taking it or credit.    We have force-graded all active assignments, and the gradebook now shows no  assignments in progress.      We can not find any way to unlock this assignment.     (And the assignment is not inherited from or to another class.)

My question is in the worksheet attached to this document.   Thank you, trinity  

Hey everybody!

First of all I want to say hallo, since this is my firstpost in this forum :-).

I really enjoy working with maple, however, I have run into trouble trying to solve an integral for a mean value.

During project work at university, we have to design a water rocket. For the design, it is crucial to know the mean thrust that is produced by the water that is exiting the bottle.

Hello! Sorry for my bad english. I have question: How do I solve non-linear otimal control problem in Maple (my version of program is 11)? I interesting in numeric result, non symbolyc. Standart tools didn't solve my problem. Please give my link for maple worksheets or other information on this topic. Thank you!

Hi my dear friends,

I’ve developed a simple procedure as follows:

I can simulate first order autocorrelation as

restart;
with(Statistics);
randomize();
n := 1000;
p := 0.9;
r := Sample(RandomVariable(Normal(0, 1)), n);
for i from 2 to n do
x[1] := 0;
x[i] := p*x[i-1]+r[i] end do;
rr := [seq(x[i], i = 1 .. n)];
Correlation(rr[1 .. nops(rr)-1], rr[2 .. nops(rr)])

 

I can simulate second order autocorrelation as

<p>Hello</p>
<p>I'm a beginner and I need to implement this recursive function with Maple:</p>
<p>$$\left\{\begin{array}{c}<br />
Z(1)=(1-p_a)(1-p_b)\\<br />
Z(i)=((1-p_a)(1-p_b))^{\left(\frac{p_a}{1-p_a}+\frac{p_b}{1-p_b}\right)^i}\prod_{k=1}^{i-1}(1-Z(k))<br />
\end{array}\right.$$</p>
<p>where 0<p_a<1 and 0<p_b<1</p>
<p>So I write in Maple:</p>
<p>Z:=(i, pa, pb)->if i=1 then (1-pa)*(1-pb) else (((1-pa)*(1-pb))^((pa/(1-pa)+pb/(1-pb))^i))*product(1-Z(k, pa, pb),k=1..i-1) end if;</p>
<p>When i=1 the function works</p>

If i had a matrix such as:

        3        3        3

M:=  3        3        3

        3        3        3

How would i sum each element in a row to get a column vector such as

         9

V:=   9

I am a newbie and this is the second post I am making. The previous follow-ups I received was very helpful and I appreciate it.

I am interested in using maple to derive derivatives of implicit functions. I have a function f(x,y) which I want to compute the gradients of it agaist r and theta. x and y are both functions of r and theta. I don't have a explicit form of f(x,y). My goal is to use this kind of operation to compute complicated higher order gradients of implicit functions so that I don't need to derive them by hand.

What is the best way to do this?

Hello,

 

I am new to Maple. I am trying to solve a big integral, but I cannot solve it using Maple.

 

The problem boils down to this integral:

int(exp(x*cos(theta)+y*sin(theta)), theta=0..2*Pi)

 

The solution of this integral is:

2*Pi*BesselI(0, sqrt(x*x+y*y))

 

How can I get Maple to solve these integrals?

Hi my friends,

I want to write a command that applies the solutions of an equation in the same name in a procedure, for example the Maple solves the following equation