Hello,

I try to calculate a big matrix product which is used after for the resolution of a differential system.

In the link below, you have the matrix product which causes me trouble.

http://dl.free.fr/p8fP9XqWn 

The matrix are composed with trigonometric functions.

I think that the problem is due to the fact that Maple tries to determine a analytical solution.

But, for my use, i only need a numerical result that i can use after for solving my differential system.

Have you some ideas in order to make this matrix product? 

Thank a lot

Two problems surfaced when I upgraded my Mac to Mavericks (OS X 10.9).

First, the old Java SE installation was removed (actually, some linkages were destroyed), so a Maple launch puts up a dialog "need to install Java." Apple hasn't yet (10/23/13) updated the software database links --- installation fails with a "can't find software" error. I reinstalled Java using the version at http://support.apple.com/downloads/DL1572/en_US/JavaForOSX2013-05.dmg. (The links can be redone, it's just easier to reinstall.)

Second, the (new?) structure for /Library/Frameworks made my Maple license invalid. I dug out the old email with my activation code, then re-activated.

And all is now copacetic.

f := Diff(u(t),t$2)+Diff(u(t),t)+u(t)+x(t);

after indicate to extract u(t), should output Diff(u(t),t$2)+Diff(u(t),t)+u(t)

after indicate to extract x(t), should output x(t)

hello .

i don't know how to change matrix to string?
for example
to become ["00101111010","00001001111"]??
how can do that?
if matrix bigger containts, how i do that??

I have Maple 15 and I am transferring it to a different computer but I cannot find the download link anywhere. Where would I find it? Thank you!

Hello, i am working on creating a smooth curve from my data points: [0.2e-1, .158], [0.2e-1, .159], [0.3e-1, .161], [0.3e-1, .164], [0.3e-1, .166], [0.4e-1, .169], [0.6e-1, .173], [0.8e-1, .178], [.1, .185], [.11, .187], [.14, .193], [.19, .2], [.28, .21], [.38, .223], [.44, .233], [.58, .244], [.82, .256], [1.4, .278], [1.71, .281], [1.78, .282], [1.78, .282], [1.81, .282]

however, I am not sure how to to create the smooth curve formula for said data points. I tried using polycurve, but it didn't spit out any equations.

I would like to Maple 18 has tabs and dropdown menus NO. So in this way the locations of the applications would be

If f(n)=a^n+b^n+c^n   and f(1)=1,f(2)=2,f(3)=3 ,n=1,2,3,.... Find f(5) ?

Hi! I am a newbie in Maple. For several days trying to read help but no luck. Search here for "solve tensor equation" does not help either.

There are tensor package and physics package but in both helps i have not found how to solve simple tensor equation A_ijmnB^_mnkl=C_ij^kl. Let's say A and C i create as analytical arrays and then create tensors on the base of them (not Arrays - for some reason the tensor cannot be created on the base of Arrow...

Hello,

I would like to plot z(x(t)) with the odeplot function.

For the moment, i manage to plot x(t) and z(t).

But i don't manage to plot z(x(t)) ?

My last code lign is wrong.

Can you help me for this plotting ?

Thanks a lot

Here my code :

M:=1;                               

1l:=1;

g:=9.81; 

sys:=diff(z(t),t,t)=-1/z(t)*diff(x(t),t)^2-1/z(t)*diff(z(t),t)^2-x(t)/z(t)*diff(x(t),t,t),M*(-l^2/(x(t)*z(t)))*diff(x(t),t,t)=M*g-M*(-1/z(t)*diff(x(t),t)^2-1/z(t)*diff(z(t),t)^2);  

Cinit:=D(x)(0)=0,x(0)=0.99999999,D(z)(0)=0,z(0)=sqrt(l^2-0.99999999^2); D(x)(0) = 0, x(0) = 0.99999999, D(z)(0) = 0, z(0) = 0.0001414213562

sol:=dsolve({sys,Cinit},numeric);

tx:=odeplot(sol,[t,x(t)],0..10,numpoints=200,color=blue,legend="x"):display(tx);

 tz:=odeplot(sol,[t,z(t)],0..10,numpoints=200,color=blue,legend="z"):display(tz); 

txz:=odeplot(sol,[x(t),z(x(t))],0..10,numpoints=200,color=blue,legend="z"):display(tz);(x)

Good afternoon sir,

I request you to support me with regard to the above cited subject.

@Carl Love

This is the integral

I do it by hand the result is Pi, but I do it with maple VectorCalculus it is zero,

how to do it fairly? please demonstrate.thanks!

Hi folks, I'm running Maple 17.02 and getting very different behaviors from subs and isolate. My actual expressions are way more complicated but this simple example illustrates the problem:

restart; with(PDEtools); F := diff_table(f(x, y, w, z, a, b));

subs(F[x] = Z(x, y, w, z, a, b), F[x]+F[x, b]-10);

subs(F[x] = Z(x, y, w, z, a, b), F[x]+F[x, y]-10);

The last line gives me what I want  Z+Z[y]-10 but the second line gives me Z+F[x,b]-10....