Hi

I'd like to see the solutions of this system of differential equation with boundary conditions :

 

restart;
with(PDEtools);
EDP := diff(s(z), z) = -.45*i(z)*s(z), diff(i(z), z) = .45*i(z)*s(z)-.2*i(z)-.8*(diff(i(z), z));
IBC := s(100) = 1, (D(i))(100) = 0

 

But, when i do : dsolve({EDP, IBC}, numeric, range = 0 .. 100);

Hi,

I'm using MAPLE 13 on Mac OS X 10.5.8 with a "French keyboard".

densityplot requires an expression or function as its argument. 

Is there any way to trick maple into using a list of points?

 

 

View 16650_Blackjackbetter.mw on MapleNet or Download 16650_Blackjackbetter.mw
View file details

I am trying to determine the mesh current method using a circuit that I have constructed using OrCad the similator has the correct voltages and currents but I am having difficulty with Maple getting the 2 matrixs to come out properly. The method is called the cramer method. I am using it in conjunction with a 2 voltage source circuit.... Matrix one is to be divided by Matrix 2

Matrix one is

40   -8   0

0     20   -6

-20   -6    10

__________

Matrix 2 is

Suppose I set

a:=plot(x^2) or some other complicated expression, but just for simplicity sake

Then I go ahead fill up a worksheet then change the a to b in the same line and alter the expression for variable b (because I didn't want to type out a new line for the variable)

How do I recall what I've set a equal to? 

eval(a,1) - just returns the plot and    print(a,1) - returns PLOT(...),1

I think there's a way but I can't recall.  Can someone point me in the right direction?

When rotating any 3dplot, for axes=boxed, how can I stop the tickmark axes from jumping around to different edges of the box?

 

Can someone give a an example what the choices in tools/options/precision/ Digit Elision or term elision are good for ? The help page is unclear to me:

http://www.maplesoft.com/support/help/Maple/view.aspx?path=worksheet/managing/OptionsDialogPrecision

 

Thanks

A small glitch

with(plots):
pointplot3d({[2,3,4],[1,2,3],[4,5,6]},symbol=box,axes=boxed)

The third point is missing from the plot however if I use axes=normal all three points are displayed but when the boxed option is enabled the point [4,5,6] is not displayed. 

It seems the autoscaling undercuts the last point and so is out of view of the plot.  In order to have the 3rd point visible (it is there) we need to use the view=[ xmin..xmax,ymin..ymax,zmin..zmax ] option.

Hi,

I'm using Maple 13, but can't use the mouse wheel scroll for the classic interface. I heard that someone can use the scroll with a PS/2 mouse, but it does not work for me either.

Is there any hack around the problem ?

Thank you,

--Boehm

Consider the following symmetric matrix A:=Matrix([[1,sqrt(2),-sqrt(6)],[sqrt(2),2,sqrt(3)],[-sqrt(6),sqrt(3),0]]); If I compute the Jordan canonical form using JordanForm from the LinearAlgebra package, I get [-3 0 0] [ ] [ 0 3 1] [ ] [ 0 0 3] This is obviously false, since every symmetric matrix is diagonalizable.

Hi (working with maple since yesterday, so question might be elementary) I have an ODE system with functions x(t,k),y(t,k), t is the independent variable, k is a parameter, as well as initial conditions. What I am aiming at is a 3-d plot of the _derivate_ d/dt x(t,k) of the first solution of the system, and t and k as horizontal axes.

Hi,

unfortunately Maple T.A. 5 is looking more and more like a significant downgrade from Maple T.A. 2.5, our prior version. In particular, the question repository has seriously increased the amount of time it takes to administer questions and assignments (see my comment in the thread "TA5 question repository" in this forum for some of the ugly details), and since writing that piece we've encountered even more debilitating behaviour. I am writing in the hope someone...

i have 3 equations as follows: x1+x2+x3 = m (where m is any constant. it can be taken 1 for finding solution) -3*x1+4*x1^3-3*x2+4*x2^3-3*x3+4*x3^3 = 0 5*x1-20*x1^3+16*x1^5+5*x2-20*x2^3+16*x2^5+5*x3-20*x3^3+16*x3^5 = 0 0