MaplePrimes Questions

I saw this error during computing

Error, (in assuming) when calling '`simplify/sqrt`'. Received: 'Maple was unable to allocate enough memory to complete this computation

Is there any way to overcome the error?

thanks

I'm new to maple and am evaluating it as a means of deriving symbolic equations of motion for a system comprising two flexible bodies sliding relative to one another and rotating in 3d space using the Boltzmann Hamel equations.  I have written up the approach but the maths is extremely tedious by hand so I wondered if maple could help.  For  a start how do I define a simple indexed 3 element vector and then create the skew matrix equivalent (tilde matrix) as...

I setup Maple 11 on windows 7   but the program does not save any data

I try to use dfieldplot but no plot appears after the call. that's what i type: > restart : > with(DEtools): > dfieldplot(diff(y(x),x) = 2.x - 2.x.y(x),y(x),x=-2..2,y=-3..3); the last command appears but no plot appears. Why ?



Im trying to resolve a simple system of 2 ecuations and 2 incognits, but I dont know why maple return the same that I put in the instruction as the answer, I will put my procedure here:

 

theta[2]:=20;
theta[3]:=theta[4]-30;

Maple returns:
                              ...

First of all my apologies for having improperly inserted graphic. As you can see in the document, Application 2, the graph is the result of having made an adjustment using SVD. I have tried to repeat the adjustment with Maple and this is what I get. Anything. Where is the problem. Any help?

 

 

 

 

Hi everyone, I'm a quite new user of maple 13 and i have a problem with the GererateMatrix command.

My porpouse is to convert a ODE problem into a matrix form so I'm using GenerateMatrix command...I pass the ODE equations as a list and then the variables as well. The results is correct and it returns exactly what i've expected but problems start here...

Once I generate the matrix  every list I've previously defined in the worksheet (as for example L:=[a=1,b=2,C=3...

Dears, How can i plot a parametric equations for an ellipse

x[i]=a*sin(t[i]),     y[i]=b*cos(t[i])      t[i] takes a numerical vaulues from - Pi to Pi.

i.e

i want to plot the values ,

(x[1], y[1]),

(x[2], y[2]),

.

.

(x[i], y[i])      where     i=1..100,


Dr. Amr

Dears. I want to evaluate the following expression numerically
G[i]=sum(Gama[i,k], k=1..100, k<>i),
where
Gama=((x[k]-x[i])*xdot[k]+(y[k]-y[i])*ydot[k])*dtheta[i]/((x[k]-x[i])^2+(y[k]-y[i])^2)^2
Dr. Amr

hi

do you know how i can define a matrix as local variables inside a  procedure?

for eg if we want to declare T as a 4*4 zero matrix and K as 6*6 zero matrix, is the followin ok:

local T::matrix(4,4,0),K(6,6,0);

.....

thanks

sarju

Hi,

 

I am trying to force the conversion of

itail*(exp(vd/Vth)-1)/(1+exp(vd/Vth))

 

to its cleaner looking

 

itail*tanh(vd/(2*Vth))

Anybody know how to do this in a straight-forward way? I've tried convert...

Hi,

When I solve this equation

Y(lambda):=_C1*sin(lambda*L);

solve(Y(lambda)=0,lambda);

Where _C1 and L are constants, I get 0.

But the solution of this equation which is easy is lambda=n*Pi/L where n=1,2,3,...

Why?

Thanks

I tried to build Pascal's triangle with powcrate as bellow described. It seem not worked and I don't know why (I am using Maple 12). Could you please help me. Thks a lot

Try to build Pascal's triangle with powcreate

Try with 2 different ways:

with u(n)  use subsop and zip to handle the list

with v(n)  use op and zip to handle the list


> restart;
> with(powseries);
 [compose, evalpow, inverse, multconst, multiply, negative, powadd, powcos, ...

This example from Mathematics. How it might translate to Maple?

t=RandomReal[{0,2Pi},20];


y=Sin[t]+.5Cos[t]+RandomReal[.1,20];

 

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