Hello,

I have made some code using lists. At some points maple answers with a memory error, telling me to "try using Array instead". Ok tried, and it works better (with some code rewrited, as Array argument values are not duplicated)

But searching in help/doc/forums for size limitations of maple objects i find nothing. Where can i find such informations ?

Ty
 

Basically if we have a:=x^2 and I subs(x=b/c,a) we get b^2/c^2. 

How do I get maple to display it as (b/c)^2?

Sometimes I do stupid things like: a := Generate(set(integer(range=1..999999999999), 1000000))); Because of the ";" the result is that Maple quickly generates the set but then locks up and spends about 10 minutes trying to display the contents. Clicking the "abort computation" button doesn't help after the result has been calculated. Is there any other way to get maple to abort in such a case? If not is there a way to stop it from displaying lists of more than say 10000 elements? PS.

Hi

In the programme I am writing, we need to multiply axb with "a" being an integer, but found as a product of 2 matrices, and "b" being a 3x1 matrix. Currently I receive the message "Error, (in rtable/Product) invalid arguements" with the following code, can anyone help?

Hello,

I have a problem with my coursework.

Here it is: how to generate a random data points (x_k,y_k) for k=1,2,3,...30

I know how to do  (more or less) the rest of the task but to generate this points no way!"!! Please anyone can help me???

Thanks

 

 

Hi all,

I am doing some research requiring solving a system of differential equations.

Excuse me for my English, I'm Dutch)    

I have a excersice I have to make in Maple, but i don't have a clue on how to do it. I will just type it here and see what the response is.

If somebody has the Calculus book written by James Stewart, it's the "Discovery Project" on page 1040..

The figure shows the solid enclosed by three circular cylinders with the same diameter that intersect at right angles/ In this project we compute its volume and determine how its shape changes if the cylinders have different diameters.

Hi, I'm trying to find the steady states of a pair of ODEs and have used the code below but i get the message "warning, solutions may have been lost".

 

> restart;

> with(LinearAlgebra);

> f := (u, v) -> (u*(1-u))-a*(u*v/(v+u);

> g := (u, v) -> b*v(a(u/(v+u))-d);

> du := diff(u(t), t) = f(u(t), v(t));

> dv := diff(v(t), t) = g(u(t), v(t));

> steadystates := solve({f(u, v) = 0, g(u, v) = 0}, {v, u});

Warning, solutions may have been lost

 

Here is a problem that cause me trouble in Maple.  Maybe it's a careless mistake, or worst, a mathematical mistake (hope not).  Can someone can help me?

View 3867_inconsistent.mw on MapleNet or Download 3867_inconsistent.mw
View file details

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.   

 

need help