Hello everyone,

I am trying to solve a system of odes but it takes too much time to excute.

I have attached the sheet. Please have a look.

ode.mw

Thanks

I have been solved a optimization problem by

Hi all,
I plot a cube using the command

with(plottools);
cube := cuboid([0, 0, 0], [1, 1, 1], color = black);
plots[display](cube, scaling = constrained, axes = boxed, style = wireframe, thickness = 3, orientation = [40, 75]) 

Now I would like to plot with different colors some of the faces/edges of the cube? How do i do it? Is it better to use a different code for the cube itself?

Bests
Manu 

I upgraded to Maple 17 from Maple 16 today and I noticed that all of the sudden I can not enter the } symbol anymore although the { symbol works just fine. (I have an azerty keyboard so those keys are AltGr+0/ctrl+shift+0 and AltGr+9/ctrl+shift+0 respectively). My solution right now is to enter the symbol each time via the fences panel, but  since it's a commonly used key this isn't really optimal. 
Does anybody know what causes this and how I can fix this? 
Thanks!

I have a rather complicated expressions involving several parameters. The parameters are calibrated to some baseline. I'm interested in having a quick look at how changing each parameter changes the value of the expression. This is very standard. I wrote a procedure to create a list of values to the left and to the right of the base value for a given parameter. I then use that to look at my expression, to plot lists of expressions, and so on.

I thought I'd share this...

Maple has a number of protected names that cannot be redefined without some work.

A common request is to use the letter j or J instead of the default I for the imaginary unit. Also common is to be able to use the letter I as an ordinary variable, rather than as an imaginary unit. For this, there is a very convenient interface command.


restart;

(-1)^(1/2);

I

interface(imaginaryunit=J):
(-1)^(1/2);
 
 J

(There...

Hi,

I have tried to solve a simple cappilary expresion but I'm not sure...
Please look for ODE, describing in the eq10.
Further I can't explain ln(-hmax).
I will be appreciated for any help.

wzel 

infiltr.mw

i do not have a handbook of function properties, or properties from analysis

is there someone written a package to list which properties a function have after input a function?

Hi,

The subs command is not working properly for Vector type, see worksheet.

I can use simplify instead, but that's not what I really wanted.

Download vsubs.mw

Casper

I've used fsolve in Maple 6 to find the roots (real and complex) of a polynomial.  I'd like to create a plot showing the location of those roots in the complex plane.  How can I do this?

Hi

I want to creat a vector that every of it's element are a function of for example 't'.

for example:

I'm sharing this in the hope it might help someone (my future self being the most likely). Since my suggestions are not perfect and a little messy, feel free to suggest better ways.

I spend a great deal of time tweaking my plots. Oftentimes I want to add labels to the curves right onto the plot. Most of the time it's easy to do. Occasionally I struggle. Sometimes I succeed, sometimes I give up.

Below is an example of the kind of plot I sometimes create. It's not perfect.

Hi,

How would you go about checking whether a vector is a scalar multiple of another in the set? eg. my set is {[-2, 1, 1, -2, 1, 1], [-2, 1, 1, 2, -1, -1], [0, -1, 1, 0, 1, -1], [0, 1, -1, 0, -1, 1]}. I need to get rid of one of the last two, since it is (-1) times the other.

What would be the most straightforward way of doing this? I've tried doing something along the lines of V1=c.V2 for each component and then checking...

Hi. I use a plot with the following options:

test1r2 :=(1/6)*(-144*x*y*z+36*x^2*y-432*z^3-432*z^2*x-108*x^2*z-432*y*z^2-64*y^3+24*sqrt(3)*sqrt(108*z^4+216*z^3*y+108*z^3*x+108*y^2*z^2+27*x^2*z^2+72*x*y*z^2+32*z*y^3+64*x^3*z-36*x*z*y^2-18*x^2*y*z-61*x^2*y^2+32*x^4+32*y^4)*z+12*sqrt(3)*sqrt(108*z^4+216*z^3*y+108*z^3*x+108*y^2*z^2+27*x^2*z^2+72*x*y*z^2+32*z*y^3+64*x^3*z-36*x*z*y^2-18*x^2*y*z-61*x^2*y^2+32*x^4+32*y^4)*x)^(1/3)/(2*z+x)-(4/3)*(6*x*z+3*x^2-2*y^2)/((2*z+x)*(-144*x*y*z+36*x^2*y-432*z^3-432*z^2*x-108*x^2*z-432*y*z^2-64*y^3+24*sqrt(3...