Hi,

I've got the following equation, which I am plotting for the range g=0.1E-3..5E-3 and h=0..10E-3

"First:=Int(Int(((2*L)/(x^2+(L/2)^2+(h-z)^2)^(3/2)),z=(-L/2)..(L/2)),x=(g/2)..((g/2)+L)):
Second:=Int(Int(((2*h+L)/(x^2+y^2+(h+(L/2))^2)^(3/2)),y=(-L/2)..(L/2)),x=(g/2)..((g/2)+L)):
Third:=Int(Int(((-2*h+L)/(x^2+y^2+(h-(L/2))^2)^(3/2)),y=(-L/2)..(L/2)),x=(g/2)..((g/2)+L)):
HorB[x]:=(B[r]/(4*Pi))*(First+Second+Third);"

The constants I am using are:

B[r]:=1.43;
L:=5E-3;

Hi there,

I want to solve several LPs of the kind

L:=Optimization[LPSolve](obj, cnsts, maximize = true, assume = integer);

where it often is unbounded. Maple then prints a warning and returns a (meaningless) solution.

Now: how do I check, whether it is unbounded?

 

 

I did a plot with plot3d and now want to insert a plane parallel to xy-plane in height z.

How do I do such a thing?

Hey I put up a Maple File in which at the end two strange things occurs:

1. Convolution n times of a rect doesn't result in a Gaussian Impulse

2. When inputting a constant of 1 everything is fine, but a limit for 1 results in a 'too many levels of recursion' error.

 

Would be glad if you could help!

Sometimes it is necessary to distinguish between continuous, discrete and hybrid systems in MapleSim. One example is when you consider generating an S-function block for inclusion in Simulink models. Firstly, how are continuous, discrete and hybrid systems defined in MapleSim? Secondly, how can you confirm the type of a given system in MapleSim?

Any reference documentation would help.

Hello,

I'm getting an error from algsubs that I don't understand...

 

This works fine....

EqD16a := (-w[j]+w[c]+3*w[c]*alpha)*(-w[j]+w)^2/(alpha*(-w[j]+w[c])^3);

 

EqD16b:=algsubs(w=beta*w[j],EqD16a);

 

This fails...

EqD15a := (-w[j]+w)*(-2*w[c]*alpha+2*w[c]-2*w+3*w*alpha-w[j]*alpha)/(alpha*(-w[j]+w[c])^2);
EqD15b:=algsubs(w=beta*w[j],EqD15a);
Error, (in collect/series) invalid expression for series

 

I don't understand why the second fails?

How could I go about creating the fractal fern for which the iteration process is as described here...

http://en.wikipedia.org/wiki/Iterated_function_system

Under the section - Example: a fractal "fern"

 

Its mostly the probability part that would be the biggest problem for me.

Hi, I am working on deriving Inverse Kinematic Equations for my robot. I have 4 simultaneous trigonometic equations in 4 variables. However, Maple is getting stuck when I try to solve these equations. My variables are w,x,y,z. Can anybody please suggest me a way in which I can solve this problem? My equations are a := Cos[w] (Cos[x] (-110 Cos[y] - 170) + 110 Sin[x] Cos[y] Sin[z] - 22) + 110 Sin[w] Sin[y] Sin[z] = x1 b := Sin[w] (Cos[x] (-110 Cos[y] - 170) + 110 Sin[x] Cos[y] Sin[z] - 22) - 110 Cos[w] Sin[y] Sin[z] = y1

Can maple be used to plot a phase portrait of this differential equation? (x,y)' = ( -2x - y , y - x^2 +x) Any light you can shed on the problem will be much appreciated. Thanks!

I want Maple to execute the following code over and over again (exepct for with(combinat) of course)

with(combinat):
unassign(anames(user)):

How do I answer this question using maple?

 

For the curve of intersection of the surfaces

5xzy + xyz + 10e -98 =0

tan(xyz-2) + ln(3x + y + z -7) =0

find at the point (2,1,1)

a) T (unit tangent vector)

b) dT/ds

c) k (curvature)

d) N ( unit normal vector)

e) B (binormal vector)

f) dT/ds

g) t (torsion)

 

Hi
How to get from the differential equation:
diff(x(t), t, t)+c*(diff(x(t), t))+k*sin(x(t)) = 0;
print(`output redirected...`); 
              / d  / d      \\     / d      \                  
              |--- |--- x(t)|| + c |--- x(t)| + k sin(x(t)) = 0

Hi, how can I generate (and plot) an array of points that are defined by a recursive formula, for example the points specified by

Hello colleagues,
Here I have for you two questions:
 How to learn to see the indexed variables, whether they are literal or standard? Without the need whattype:

whattype(x[2]);
print(`output redirected...`); # input placeholder
                                   indexed
whattype(`#msub(mi("z"),mn("1"))`);

Hi all, Is there a feature in Maple to collaborate? I mean: is it possible to work at the same maple file from 2 different computers simultaneously and join the results? It would be great if there's the possibility to work in real-time together, but comparing the files after editing and combining the changes to both documents in one Maple file is already satisfying. Thanks in advance for your advice. Giel