Hi everybody,

Like the title said, I have a DC circuit (*.msim attach here).  In two differents ways, I find the current in R3 to be equal to -1A (*.mw attach here).  The M17 file is in french but the equations speak for themselfs.  Can someone help me to sort this problem out.

problème_5-4.msim

Solution_5-4.mw

Thank you in advance for your help.

I use maple 16, whenever I try to plot two polar curves on the same axis, it gives me a wrong graph. However with maple 15, I get the right graph. How can I plot two polar curves on the same axis with maple 16?

I have a matrix A4  

I am trying to use the procedure described in the answers to this question: 

http://www.mapleprimes.com/questions/100137-Solving-Trigonometric-Equations-For

to find the solutions to sin(2*x) = 1/2 where -2*Pi <= x <= 2*Pi. After the isolve() command is issued, I get the warning that solutions may have been lost. i think the issue is the form in which Maple represents the general solution to the equation. Any ideas on how to rectify this would be greatly appreciated!

Dear Maple users

I have a question, which is probably very basic, but I can't find how to handle it in the Programming Manual or elsewhere. I need to declare a parameter, which is a vector of lists. Example of element:

< [3,7,2,4], [-3,6,8,0], [-5,8,4,2]>

Vector has n components and each list has k components. I tried declaring it like:

boxVector:=Vector(n,datatype=list());

and other ways, but it didn't work. How can it be done?...

Hello,

I'm rediscovering maple, and i want to find the zeroes of an expression by numerical calculation. But it seems that the function fsolve can not handle the monster i created...

(The monster in question here is a determinant of a 12x12 matrix with one variable an trigonometric functions that i don't want to copy pas (NDA))

The problem might comes from the extrem values it gives for a numerical calculation (slope around 1e6)...

My problem is How to use events command in dsolve/numeric for different points of independent variable?                                     A simple example:

de:=diff(x(t),t)=-x(t);

ds:=dsolve({de,x(0)=1}, numeric, method = rkf45,abserr=1E-12,relerr=1E-11,events =[[x(t)-1E-8,halt]]);

works perfectly, but I need to compare x(t) and x(t-h) in two consecutive...

How to compute the integral: int((c-x)/x)^n,x=a..c) ?

This integral is an incomplete beta function and could be expressed in terms of hypergeometric function, but my Maple refuse to deal is. Pleas help

Hello

pl explain me how to find a and b in this eqation

a^x + b^y = 1,

were a= 5 and b= 8 

thanks

I want to invlaplace the following complex expression that I call PQ.

>PQ:=(cosh((1/2)*eta*sqrt(C3^2+4*C1*s))*sqrt(C3^2+4*C1*s)+sinh((1/2)*eta*sqrt(C3^2+4*C1*s))*C3)*(cosh((1/2)*eta*C3)-sinh((1/2)*eta*C3))*(-cosh(C4)-sinh(C4)+s)/(s^2*(-sinh((1/2)*C3)+cosh((1/2)*C3))*(sinh((1/2)*sqrt(C3^2+4*C1*s))*C3+sqrt(C3^2+4*C1*s)*cosh((1/2)*sqrt(C3^2+4*C1*s))))

where C1 C3 C4 eta are constant .

Then I do like this

>invlaplace(PQ)

But I got

Hello everyone, I've been trying to solve a nonlinear ODE that has resulted in the following 5 equations

When solving a ODE system, I get "the lenght of the output exceeds the limit of 100000". This was expected so, it is OK with me. However, I would like to be able to see part of the output. Then, I can start making susbtitutions (algsubs) and shrink the output. So, how can I print just a few lines of the output?

Hello,

I'm interesting to model with MapleSim a system with absolute coordinates. Indeed, i would like to compare my analytical results i have found with the symbolic equations i can generate with MapleSim and the model i have built was made with absolute coordinates.

So, is it possible to model a multi body sytem with absolute coordinates instead relative coordinates ?

For the moment, i have found any model (or tutorial) with absolute coordinates ?...

what is the difference between using DEtools forexample bernoullisol and dsolve directly?

I have a maple document with a few dozen plots. I am using the code

plotsetup(ps,plotoutput="C:\\plot.eps"); plot(x^2,x=-1..1); plotsetup(window);

to save the plot as an eps file. Is it possible to alter this code to save the file as a pdf? I've tried changing ps to pdf, but this doesn't seem to work. Thanks!