Please could you please help me finding closed expression for the following double integral

 

restart;

with(LinearAlgebra);

rho := .25; sigma := .1; SNR := 25;                                                                    

 a := (32*12)*Pi*sqrt(1-rho^2...

Hi, i am new to Maple. I was trying to solve some problem and came up with the following difficulty:

When i give input

a_i=(1+k_i)/(1-k_i);

 

and then do a_1 it gives the proper output as 

 

(1+k1)/(1-k1);

 

But whenever i try to do

a_i,j=(k_i-k_j)

I am using an old package, Janet, I got from http://wwwb.math.rwth-aachen.de/Janet/janet.html with Maple 16.

I changed the libname to point to the directory where the package files are.

Few days ago I was able to call help(Janet); without any problems but now everytime I try to call help(Janet)

Maple front-end loses connection to the ihe Maple kernel.

The package loads fine...

Hello,

Please, i want to resolve a non linear eaquation with Lagrange multiplier with 4 variables.

But it dosen't work.

Can you help me in this.

 

Thank you

Multiplicateur_de_La.mw

Good afternoon everybody,

 

I have a question regarding the command matrixplot. I wrote a programm with two input parameters:

v=[seq(0.29+i/100,i=1..8)]

k=[seq(2*i,i=1..50)]*0.5*10^(-15)

 

and I get a matrix [8x50] that I want plot.

The problem with matrixplot is that I get in the axis the number of rows and columns but I would like to put the value of v and k instead of the row/column's number. Someone knows how I can change that?

Hi all,

I have a problem with dsolve. I have a 2-d (thin shell) theory which I am solving with Maple. For a Simply supported beam, there is no problem, it solution is more or less what you would expect. When I make 1 side as a clamped edge (x=0), there is a problem. The total result is 'ok', but it gives a peak in the 2nd derivative of Urn at x=0. This peak results in unrealistic stresses, etc.

I don't exactly know what the problem is. It seems there is a problem...

Dear All,

 

I am trying to call the maple function fsolve in the matlab. I have used maple('fsolve(x^2-4)'). It worked.

 

Now in the matlab code I have defined another variable. let us say a = 10.  Now I am trying to call the fsolve as follows.

maple('fsolve(a*x^2-4)')

I ended up with the following error.

 

Error, (in fsolve) number of equations, 1, does not match number of variables, 2

Hi...

I need to solve the pde 

eq := diff(diff(V(y, t), y, y)-alpha^2*V(y, t), t) = -I*alpha*U(y)*(diff(V(y, t), y, y)-alpha^2*V(y, t))-I*alpha*(diff(U(y), y, y))*V(y, t)-(diff(V(y, t), y, y))+alpha^2*V(y, t)

with U(y) as a known function

and boundary conditions as

bcs := {V(-1, t) = 0, V(1, t) = 0, (D[1](V))(-1, t) = 0, (D[1](V))(1, t) = 0}

and initial condition as

V(y,0)=phi(y);

both of phi(y) and U(y) can...

I have a numerical procedure that reads data from a file and builds a composition of maps from the half-plane to the slit half-plane.  Maple does not deal with this very well symbolically.  I want to use the complex values from this function as a vector field and plot some integral curves.  The 'mystery' function below is a stand-in for the real thing*

I can get DEplot to at least show the vector field, but it fails mysteriously on drawing any curves,...

Hi,

     Theres seems to be an error in the SphericalY function when the input is SphericalY( l, -l, theta, phi)

restart;

assume(phi, real):assume(theta, real):

for l from 1 to 2 do  
   m:=-l; 
   s:=SphericalY(l,m,theta, phi);
   f:=s*conjugate(s);
   plot3d(f, phi=0..2*Pi,theta=0..Pi,coords=spherical);#sphereplot(f, phi = 0 .. 2*Pi, theta = 0 ..Pi,  style...

Hi,

I'm searching for the third differential equation that will transform the following two equations non-autonomous system into a three equations autonomous one:

diff(x(t),t)=-x(t)+2*(m*t+n)*y(t)-2*k*(m*t+n)²

diff(y(t),t)=-y(t)+k*m-(m*t+n)*((x(t)/2)-1)

 

diff(z(t),t)= ...

 

Regards,

Johnny

Maple_17_fault.mwA piece of code presented in attached file can be easily calculated with Maple 13 and ancient (Pentium M) laptop. While Maple 17 and modern PC with Core i7 3770K and 32GB RAM on board unable to do the same. What's wrong? Do I need to make some settings of Maple 17? Can I install Maple 13 and Maple 17 on the same PC? Will not any conflicts occur? Thank you.

Hi,

     I would like to plot a potential on a sphere, with colours and equipotential lines too. I can easily get the colours with this

f:=(psi-Pi/2)^2 + (theta-.5)^2;
plot3d( 1,psi=0....2*Pi,theta=0..Pi,coords=spherical,scaling=constrained, style=patchnogrid, color =f ,lightmodel=none,contours = 60,numpoints=6000);

but cant get the contours to be the level sets of f.  I tried 2dcontour, contourplot3d, etc, but in spherical cordinates...

How to solve with maple using integration by parts the integral?int(sec(x)^(n),x);

Hy, I am trying to design a game with maple. For that I simulated the 6 rolls with the random function. Now I'd like to display them on 6 different buttons. I desgined the buttons, but I can only manage to get a fixed expression on them (like "dice"), but no variable. My idea is to take the element of a list (6 rolls in one list) and display it on the button. Can anybody help me please? Thanx!