Hi there,

I have a system of seven equations and want to make a phase plane with field arrows for two independent variables (C vs I). When I use DEplot it doesn't give me field with arrows. I just wonder if anybody could please help me in this issue. Here is my system:

dp/dt = P kappa I-gamma[1] CE- delta[1] CH

dE/dt = lambda E(E[0]-E)-gamma[1] C E

dI/dt = gamma[1] CE + eta Ia/(epsilon+K) -kappa I -alpha K I-delta[2] I M

dIa/dt = alpha K I+delta[2] I M

I have a model which contains 3 variables and several parameters, the equtions are as following:

diff(i(t),t) = alpha*B(t)*S(t)/(K+B(t))-r*i(t)
diff(S(t),t) = -alpha*B(t)*S(t)/(K+B(t))+b*(N-S(t))
diff(B(t),t) = e*i(t)+g*B(t)

How can I solve them to get the solutions by using Maple, and plot them?

Sorry I'm just a new learner with little math background. Plz explain more specific if you want. Thanks for your help.

I just wondered if there was a similar rule for sine.

I have the system of two difference equations. I need to plot phase plane of (x(k), y(k)).

Hallo,

I would like to parse function name of parameters (type is function) in my procedure.
I expact for the one parameter this fun::Or(name, function(name). This is exactly the same type like the second parameter in procedure rsolve. 

For example:
The value of the parameter fun is y(n) and I would like to parse function name y and function variable 

Dear Maple users

I have encountered a strange problem when trying to make inline evaluations in Document Mode. The shortcut Ctrl+= does work on my stationary Windows XP machine, but does not work on my notebook running Windows 7 (64 bit).

To make it clear: I change to Math Mode using the F5 key, type the expression and hold Ctrl and Shift key down and press the key with the = sign. And Yes, I am using Document Mode!

When I rightclick in order to use...

  We have two random points A(X1,Y1,Z1) and B(X2,Y2,Z2) in the unit cube, ie X1, X2, Y1, Y2, Z1, and Z2 are collectively independent random variables uniformly distributed on the interval [0,1].
  How to find  the mean of the distance between A and B with Maple? The same question in higher dimensions.

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1. Why won't #$%^ Mapleprimes editor let me reply to the original post? I press "add comment" and I get pointed back to the branch two steps back. Anything I write comes out blank when I submit, so now there are two blank replies credited to me! Does that give me points I don't deserve?

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A recent announcement said that downvoting was removed because "many MaplePrimes did not like it".  MaplePrimes?  Is that what are we called?  How about primers?  Or maybe primarians?

I have a worksheet that I want to close from within the same worksheet.

Does anyone have any ways of doing this?

I had hoped there might be something to do this in the Worksheet package -  but that's not really what that package is designed to do.

I can imagine something that raises a sufficiently problematic error code that causes the worksheet to kernel connection to be lost, but don't really know how to go about doing this in a reliable and nondestructive way.

Maybe there is a way to issue a system (or ssystem) command to kill the appropriate process? This would need to be sufficiently robust as to work for Windows, Mac, Linux, and Unix - as well as any other supported Maple platform.

Has anyone ever done this? If so, how did you do it?

Thanks in advance,

Heat equation using piecewise conditions in Maple produce (unwanted?) oscillations at the transition.  Not sure if this is normal or a side effect of using a piecewise boundary condition in the equation?

I came across a slide presentation for the heat equation having Neuman conditions using a piecewise boundary condition and I thought I would apply the example to Maple.  The piecewise nature of the boundary condition in Maple causes oscillations at the transition...

Is there any way to modify the shading colors used in shading=zhue? 

Maybe similar to what was done in the post for Color of the plot of convex hull of points or perhaps there is simpler way? 

hi,

how i could plot the above equation in a specific range of tau and Tau when all the other parameters all also a function of these two variables?