s:= int((1/4)*sqrt(2)*exp(-(1/2)*(x+k*sin(-theta+phi))^2/sigma^2)*(1/(2*Pi)+Q*cos(k*phi))/(Pi^(3/2)*sigma), phi = -Pi .. Pi);

how to use reduce command to get prime ideal?

i find PrimeDecomposition and PrimaryDecomposition in package with(polynomialideal):

is the primedecomposition for prime ideal?

any command same as http://www.singular.uni-kl.de/Manual/3-0-4/sing_244.htm

This is related to my previous question regarding int versus Int.

In the process of trying to answer my own question I tried the following:

> q := exp(-x1*log(x1)-x2*log(x2));

                         exp(-x1 ln(x1) - x2 ln(x2))
> 
> evalf(subs(r = 1, int(int(Dirac(x1+x2-r)*q, x1 = 0 .. 1), x2 = 0 .. 1)));
                                     0.
> evalf(subs(r = 1, int(simplify(int(Dirac(x1+x2-r)*q, x1 = 0 .. 1)), x2 = 0 .. 1)));

Can anyone explain why I get a different answer if I use int instead of Int in the following evaluation:

> evalf(subs(r = 1, Int(Int(Dirac(x1+x2-r)*q, x1 = 0 .. 1), x2 = 0 .. 1)));
                                 1.676209155

> evalf(subs(r = 1, int(int(Dirac(x1+x2-r)*q, x1 = 0 .. 1), x2 = 0 .. 1)));
                                     0.

hi, i have a function in seri's with one unknown parameter and i want to solve it for this boundary condition : f(infinity)=1

I use pade approximation but in my case it doesnt work. i want to know is there exist other  method in maple for this problem. for example other rational function.

thx

for simple case 2*2,  A = matrix([[0,-1],[1,0]]);

using A, i understand f(x,y) = f(-y,x)

where do other case f(-x,-y) and f(y,-x) come from?

any command to list all cases with input a matrix A?

if A has more dimensions, what will the cases be ?

Hi , how do I get the binomial expansion of  1/sqrt(9+4*x^2) .  I am using expand(expression,binomial) . But Maple just

returns the expression.  Thanks .

how to x1, x2 ... with xi in procedure?

b := 1;

for i = 1 to 3 do

     b := b*1/(1-xi);

od;

but xi can not represent x1, x2, x3, which commands can present x1 x2 x3 ?

restart; with(Statistics)

#Define:

A := RandomVariable(Geometric(p))+1; F := Mean(A);M := abs(A-F)/A;

#and ask Maple to find a pdf of the r.v. M:

f := `assuming`([PDF(M, x)], [x > 0])

#Maple 15 gives an answer, but what does it mean by the output for this input

subs(p = 1/3, x = 3, f)

#or how do I plot this pdf of M? Does Maple give a correct answer?

# Why does the error message appear when I do subs(p = 1/3, x < 3, f...

which package containing command to find prime ideal and quotient of ideal?

How to assign value to matrix in procedure?

with(ArrayTools):
kontraHom := proc(M, s)
dim := Size(M);
n := dim[1];
m := dim[2];
R := [][];
for i from 1 to m do
    for j from 1 to s do
        for k from 1 to n do
            R[(j-1)*n+k,(j-1)*m+i] = M[i,k];
        od;
    od;    
od;

c := y^2+2*y*x+x^2-y^2*x-y*x^2

solve(c);

{x = -y, y = y}, {x = y/(-1+y), y = y}

above polynomial find roots using solve

if do reverse to find back its polynomial c from {x = -y, y = y}, {x = y/(-1+y), y = y}

any command to do this? is it possible to do this? which book teach this?

I'm running simulations in which I produce many plots at once, the purpose being to compare differences as parameters are changed. I'd also like to use some of these plots for publication. I've had problems getting good-looking 3d plots. Here's a strange thing I noticed.

Export the graph by mouse-clicking, export to bitmap:

EDIT : IMAGE POSTED IN MY COMMENT BELOW

Export the garph by executing a plotsetup('bmp') command.

1. How many and which file format can be used to save a list of formulas?

2. how to append to above file?

i would like to let c# program to read the formula in the saved file