Getting a single result from resultset...

Hi. I have a simple problem here. I only need one result from a result list that maple gives me. As you can see below. I need the value of the variable F. But maple does not give me a single result (in this case 2), it gives me many. So how do i tell maple to give me only the first result (1.0353)? > evalf[5](solve(K = S*F^n, F));

Question on simultaneous equation (potentially non...

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.

Eliminating u*Dirac(u) without integration...

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.

Need a little help...

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 Ez along the z-axis given by the integral expression (I'll do the best I can to illustrate it here)

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

improve flexibility of writedata...

writedata requires me to know whether the thing I will be writing is string, integer or floating.

I want to write a matrix where the type of entries can vary.

Is there any way to do this with writedata?

laplace transform not so easy...

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

tabs & code layout...

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

An easy logistics question I am sure you can fix...

<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.

Need some help debugging a diophantine problem ple...

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.

intermediate results...

for which x and y does the equality hold, z = x+iy? (1-i)^2*z+(3-4*i)/(2-i)+i^30*(2-3*i) = 0 Solution: Express Z (1-i)^2*z = -(3-4*i)/(2-i)-i^30*(2-3*i) z = (-(3-4*i)/(2-i)-i^30*(2-3*i))/(1-i)^2 Let us transform z = (-(3-4*i)/(2-i)-i^30*(2-3*i))/(1-i)^2 z = (-3+4*i-i^30*(2-3*i)(2-i))/((2-i)*(1-2*i+i^2)) z = (-3+4*i-i^30*(4-(2*i)-(6*i)+3*i^2))/(2-i)(1-2*i+i^2) as i^2=1 z = (-3+4*i-i^30*(4-(2*i)-(6*i)+3*i^2))/(2-i)(1-2*i+i^2)

how can i change the x-axis resolution in semilogp...

Hello,

I would plot a function over a large range on the x-axis (from 10^-10 to 1).
So I use : "semilogplot(G,10^-10..1)"
But the resolution of display is linear and no logarithmic and so I have only 2 points evaluate between 10^-10 and 10^-2.
Someone could tell me how to have a logarithmic resolution on the x-axis ?

Thanks a lot,
Ben

DEplot. Setting initial varialbe conditions...

<p>i have the following DE <maple>de := diff(y(t), t) = y(t)-y(t)^2+.3*sin(2*Pi*t);</maple> and i want to set the initial conditions initis:=[[y(0)=0.5],[y(0)=1.0],[y(0)=1.5]] which i know how to do, however, i need to do this for an initial t<sub>0 </sub>of 0,1,2.....10.</p>
<p>I currently have <maple>DEplot(de, y(t), t = 0 .. 10, inits, y(t) = 0 .. 2, stepsize = .1);</maple> which is for t<sub>0</sub> = 0 but have no idea how to do this for any other  t<sub>0</sub></p>
<p>Any help would be great. Thanks</p>

Hey Guys,

I'm new to this forum and only have a basic knowledge of maple. I need a program to implement the conjugate gradient algorithm but dont know how to go about it. Can anyone help?

Cheers

How to order with respect to functions AND derivat...

Good mornig,

I've this expression