Hello,

I have some difficulties with the transfert function of a circuit. After a lot of simplification I find this equation:

R*C*diff(v(t),t)+v(t)=i(t) with R=K / i(t)

I have never seen this kind of equation before, I hope someone could help me, google is un-useful to this.
Then, I would solve this for a heavyside and sinusoidale current. How can I make a heavyside with maple ?

Thanks,
Ben

Hi!,

I've a problem with special waveforms like Square, Triangular and SawTooth. I've to solve a RLC circuit ODE for the capacitor's charge  (q(t)) as a function of time with an Voltage input of a Square Waveform, Triangular WaveForm and a SawTooth Waveform. I solved the problem with one oscillation for each waveform, but the problem says that we have to work with the periodical characteristic function for each of them.

My question : How can I transform one oscillation in a periodical function with maple? (repeating that oscillation along the time).

Why can I not get a common denominator from a/2+b/3?  Maple returns 1/2*a + 1/3*b and not (3a+2b)/6.  Normal(a/2+b/3) returns the same equation.

If I simplify(a/b+b/c) I get (a*c+b^2)/(b*c) but doesn't seem to work right with numbers in there.   

One can solve simultaneous equations if there are sufficient number of unique equations. If I do not have sufficient number of equations, I would like to generate a response that prints what is missing. How do I accomplish that? Any ideas? Thanks a lot in advance.

Trivial linear equation sample: 2x + 3y=0, y=2 - z. Solve x, y, z.

I'd like to eliminate all terms multiplied with u*Dirac(u) in a rather long function. For example, if

den:=a*u*Dirac(u)+b*u*u*Dirac(u)+c*u^(3/2)*Dirac(u)+v*Dirac(v);

is my function. Then the result I desire is,

v*Dirac(v)

I tried

subs(u*Dirac(u)=0,den);

but it did not work.

As my original function is rather cumbersome, I do not want to integrate it for this result.

Any suggestions are welcome.

Okay, I'm just starting to get the hang of Maple and I'm going through a tutorial that has a problem in it I'm having a little difficulty setting up. 

A charged disk of radius a having uniform charge density "sigma" (the actual symbol sigma) produces and electric field E_z along the z-axis given by the integral expression (I'll do the best I can to illustrate it here)

E_z(z) =  (sigma * z * int ( r/((r^2+z^2)^(3/2)) ,r=0..a))/(2*epsilon₀)

Hello all,

I would study the time response of a electronic circuit and to this I need to evaluate the laplace transform of the function :

G(I)=( 1-exp( -sqrt(I) ) ) / sqrt(I)
with I = sin(w*t)

Someone can tell me where how to do this. I have no idea.... :-(

Thanks,

Ben

Hi

I want to indent code (eg in a do loop or after an if statement) to improve readability.

The tab button is disabled in maple worksheets (as opposed to documents).

Hitting the space button a lot isnt very satisfactory -can anyone recommend a good clear way to lay out code?

thanks

<a href='http://mapleoracles.maplesoft.com:8080/maplenet/primes/worksheet/5348_Double X.mw'>View 5348_Double X.mw on MapleNet</a> or <a href='http://www.mapleprimes.com/files/5348_Double X.mw'>Download 5348_Double X.mw</a><br/><a href='http://www.mapleprimes.com/viewfile/2510'>View file details</a>

I am trying to get my Maplet, at the url above, to return 2 times the number

the user enters for X. I want it to return it in the textbox I created.

The output textbox does not appear as I want it to.

Given a positive integer k, another integer q >=2, the problem is to find the set of all positive integers {k_1,k_2, ...} such that

sum(k_iq^i,  i=0..infinity)  = k).
 

Note that for a given k this sum is always finite and so the solution set is always finite. Generally the output will consist of the array [k_0,k_1,k_2,...] but the output we seek is to print out only the terms [k_1,k_2,...] from this solution and then use this output later on for something else.