Maple 11 Questions and Posts

These are Posts and Questions associated with the product, Maple 11

I meet a problem in the  Lipschitz–Hankel integral as follows,


The output is always the same as shown above rather than a float value. How can I deal with such a integral?

Many Thanks!


I solved an equation, and Maple returns two values.  Even though I said, assuming v1i>0, the solve command returnse this:

The following codes is a part of my program for computing ING at several points of r between -1 and 1 (by a step of for example 0.1 or even smaller for a better pointplot of ING(r) ):

H:=(r, teta) -> h(r, zn, teta) # h is a complicated function of (r, z, teta) (referred to the attached maple file) and   zn is a given number

F:= r -> int(H(r, teta), teta= 0…alpha)

A simple question. I have this:



And I want to group it by x, y, z, so that I would get:



I'm using Maple 11.

Hello! I need to have two simultaneous processes: first is maplet and second .exe. I tried fork and exec but there were errors:

Error, fork (exec) not supported on this platform.

What can I do with it? OS: Windows7 x64 

Using Maple 11.



i want to simplify this expression (f@f@...@f@f)(x)

f is repeated "n" times

e.g: for n=3

we found (f@f@f)(x) .


help me please.

Hello, can you help me? I need to draw a simple model of solar system (9 planets around the sun). I tried to draw planets with

> a[1] := animate(implicitplot3d,



I ‘d like to compute something as follows at certain r and z, but first I must compute the integral and then substituting the r and z values.

A(r, z) = int( f(r,z, teta), teta=0..0.78)

But the problem: f is a complicated function of the 3 variables (including BesselJ(0,..), sin & root square functions, ..!!) thus a simple int command...


can you help me, I want to make a convolution on this :

 But I really do not know how to deal with the diff...



Sorry for my english

For any positive integer, N, I need to create an N by N matrix whose (i,j)-entry, i-th row, j-th column, is (((1+j-i)*N+j)/(2+j-i)!) *z(2+j-i) for indeterminates z(0),z(1),z(2), etc. and z(k)=0 for k<0. How can I do this?


Is there any  function  in maple to compute the SVD of a matrix  using jacobi method? Or anybody has maple code to do so?


I am working on my project related to bioinformatics. I am using Maple 11 for calculations related to matrices.

I need to calculate  Moore-penrose Pseudoinverse. I need to know the algorithm used by Maple function

'MatrixInverse' for calculating pseudo inverse of matrix.



I have a problem with the numerical integration in Maple. Any help or suggestion will be greatly appreciated!


K[1] := 1.0;
K[2] := 1;
K[3] := 0.16;

local k,q,h;
end proc:

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

I have to evaluate several complex integrals involving square roots. Maple automatically assume the branch cut is all negative reals. Is there a way to change this? This would make my life alot easier! thanks!

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