Hello All ,

I have attached my workseet for reference.

I find it strange that the solutions calculated in optimization shows a value "X" but when i try a value greater than "X" , there is still a solution available which is very irregular.Since the optimization finds the value beyond which the solution for a6 is zero/negative.

I am not sure what is causing this problem or is it just the problem with the optimization.

Hi all!

I have declared two vector valued functions

G1:=(x,y,u)->(x/(1-a*y) , y/(1-a*y) , u/(1-a*y));

G2:=(x,y,u)->(x/(1-b*x) , y/(1-b*x) , u/(1-b*x));

And composed them, so far so good

G1G2 := G1@G2;

But now I would like to simplify G1G2, how can I do this? With simplify(G1G2) I get an error.

Any idea how I can fix this?

Thanks in advance,

Arta

Hi everyone, Im trying to solve a catenary problem. x is defined in terms of y1, y2, and a. But in my case a is the only unknown. I try to express a in terms of x, y1 and y2 by the following script:

> x := a*arccosh((y1+a)/a)+a*arccosh((y2+a)/a);

                      /y1 + a\                 /y2 + a\
       a arccosh|----------| + a arccosh|--------|
                      \  a   /                    \  a   /

> solve(x, a);

      ...

Using Maple for Functions of a Random Variable

How to make a query is made to F (t) at each iteration of the dsolve command?...

restart;
de:=m*diff(x(t),t$2)+b(t)*diff(x(t),t)+k*x(t)=F(t);                 
a random force :
nd := Statistics:-Sample(Uniform(-100, 100)):
F:=proc(t) ;   
if not type(evalf(t),'numeric') then      

Hello,

  Excuse me, I have a code

****

for i from 1 to 5 do
  f[i]:=i*2;
print(i,f[i]);
end do:

****

  In windows, the output is

**

                              1, 2
    ...

I am a programmer (not a real mathematician, scientist or engineer) who wishes to insert just dx into an expression and have Maple recognise this as an infinitesimal difference in x rather than just a symbol named dx with no relation to x.

Is this possible in Maple?

I ask as I want to include dx as a normalising term in a derivation and hope that it will 'drop out' at a later stage.

Regards,

Will Furnass

Hi,

I want to solve this differential inequation in maple please help me.

diff(N(t),t)-mu*N(t)<=Pi;

At first I wanted to post this message as a response to a question

http://www.mapleprimes.com/questions/136153-AnimateDisplay 

But for some reason the message is not loaded.

Look at the example of animation of astroid. First you need to create animation frames as separate graphical structure (in my example - it is E[k] ). And only then by  plots [display]

I want to animate the display of a polygon. It's the platform of a stewart gough rig. Have 200 poses stored as Platform_i i i=2..200. the Base is static( obiviously). Haven't been able to figure out how to get    animate(display .....) to work. The work sheet just contains copy/pasted commands. The time period for the animated display is about 10 seconds but real time is not that important. How do I get this to work?

Suppose I have a matrix M, with rational entries. I need to go row by row and scale each individually by the smallest possible integer such that the entries in each row are integer-valued - anyone have an easy way to do this? It's a large matrix.

i do have two equations containg two pararmeters, i need to exclude one parameter, then substitute it in the second equation and then differentiating the first equation which contains now one parameter, then solve it for that parameter.

i actually did it, but fsolve function does not work with me , can you help me please

I have a symbolic expression of the form:

Hi, I was trying to carry out a Sybolic integration "u1" as below:

> assume(0 < ct, ct < cl);

> u1 := int(int(sin(omega*(ts+ys/ct))*Heaviside(t-ts-ys/ct), ys = H-cl*ts .. ct*ts), ts = H/(cl+ct) .. (H+cl*tau[l])/(cl+ct));

and I use a special case "u1test" to test if u1 is correct:

> u1test := int(int(sin(omega*(ts+(1/3140)*ys))*Heaviside(t-ts-(1/3140)*ys), ys = H-6300*ts .. 3140*ts), ts = H/(6300+3140) .. (H+6300*tau[l])/(6300+3140));

(a colored band on a torus)

hi

I have a problem when i want to write some data on a file.

the main program is work,but when it wants to write,this error is shown:

Error,invalid input: writedata expects its 2th argument, data, to be type of {set,hfarray,list,matrix,array(1),list(list)}, but received HFloat(-0.08716693)

the program is:

restart

fd:=fopen("e:/teta.txt",read)

fg:=fopen("e:/c.txt",write)

g:=readdata(fd,3)

with(linalg)