Dear all,

I've got a Vector,

>V:=<xt[1, 1]*xt[1, 2]*alpha>;

and what I want to get is the elements in V which has xt[2,2]. In this case, <NULL> is what I am looking for.

I tried the following line:
> select(has,V,xt[2,2]);
     The result is Vector(1, {(1) = NULL});
when I tried
> select(has,V[1],xt[2,2]);
     The result is 1.
I have no idea where this

Good Night.

I have problem when i am using ODE, because i have an error : (in plots/odeplot) curve is not fully specified in terms of the ODE solution, found additional unknowns {x3(t)}

I do not know how I can 

I myself have written some programs of math in Maple (e.g. ABC.lib, ABC.ind, ABC.mw).
Who could help me how to upload these programs for everyone using easily without downloading and setup them? Thank you so much!

there are several method to provide solve recurrence problems  in Maple,such as define ,rsolve,etc.here ,i meet a problem.

i want to compute the function Gamma(n), if n is a posint ,only given recurrence relation f(z)=(z-1)f(z-1),initial condition,f(0)=1,then i can get the true result with rsolve,of couse,i had made  an ansatz that z is n::posint.yet ,z is not posint? To suppose z  equal to 5/2, (2*n+1)/2 more generally,how can get the answer((2n-1)!!*Pi/2^n).

How to graph a function f(x)=x^2-8x+20. Then use Maple to find all the real and complex zeros?

I have a small Maple program which is manipulating lists which have a habit of becoming too long for maple to handle, which yields the error " 

I would like to generate a symbolic sum of the first "n" derivatives of a function.

For example, f = 1/(1-x^4)

sum(f^(n),n=0..3)

The response from Maple is not as expected.  The first term is:  -1/(4*(x-1)) and the subsequent terms are less recognizable.

If I use "seq" with the same syntax, I end up with a list that includes the function and the first 3 derivatives.

I have also tried:

sum(diff(f,x$n),n=0..3)

Hi all,

I want to calculate for example MultiInt(x,[x,y]) or MultiInt(y,[x,y]), etc.. in a triangle whose the coordinates of the three nodes are (x1,y1), (x2,y2) and (x3,y3).

Thanks for any help

Kamel

Help_Lplot.mw

I cannot get the proc Lplot to work in the worksheet above. Will someone please help?

Hello,

When I type "hypergeom([a+1,b+1],[c+1],z);", Maple switches "[a+1,b+1]" to "[b+1,a+1]" when using the 32-bit command-line interface.  This does not happen when using the graphical java user interface, nor with the 64-bit version...

Why does this happen?

-- Regards,

Franky

I have been reading through the following book:

Hilderman, Robert J. and Hamilton, Howard J., "Knowledge Discovery and Measures of Interest," Kluwer Academic Publishers, 2001.

To better understand the material in Chapter 3, "A Data Mining Technique" I have written a Maple Worksheet implementing...

How can I calculate F(6/7) - F(-6/7) to find probability related to central limit theory?

I need to first use the F:=x-->y to define F. What I'm getting is not helping me answer my question. could someone please tell me the steps to find an answer? 

Hi I'm Oscar and I'm new on this forum.

I would like to know how does Maple manage Normal random variables when I want to obtain a symbolic expresion like the following (use of Variance to compute symbolically the variance of a combination of normal random variables with its characteristic parameters also symbolically defined)

with(Statistics):

x:=RandomVariable(Normal(Mux,Sigmax)):

y:=RandomVariable(Normal(Muy,Sigmay)):

z:=Variance(x^2+y^2+x*y+c): (1)

VEH_We.mwDear Community

I try to plot a rather sophisticated function with Bessel functions and several roots of a transcendent equation, but failed. I've specified all parameters, functions, etc. yet I still get an error message. What do I do wrong? I've uploaded the file,  if you could have a look.

Tx in advance, best regards

Andras