MaplePrimes Questions

My question is related to this discussion on "querying events"

http://www.mapleprimes.com/questions/125273-Dsolve-Events-How-To-Control-For-A-Sign-Change#comment125426

I thought I might start a new thread.

The following loop is an illustration of the sort of thing I'd like to do with dsolve and events: I loop over a parameter of the "event" and extract information on the solution at different values of the parameter. Here is the code (successfully tested on Maple 15 / Standard / Windows)...

Hello everybody,

I try to find the intersection point for the following equation, but I didn't get any or just "warning, ..." where is the problem? and how can I solve this!?

 

> S1 := proc (t) options operator, arrow; F[1](t)*m[1]*(1-F[2](t)) end proc;
> S2 := proc (t) options operator, arrow; F[2](t)*(m[2]+F[1](t)*m[1]) end proc;
> F[1] := proc (t) options operator, arrow; (1-exp(-(p[1]+q[1])*t))/(1+q[1]*exp(-(p[1]+q[1])*t)/p[1]) end proc;

Hi,

I reach to these balance equations Equations.pdf  in my queuing system where all parameters (N, S, m, λ, μ, x) are positive integer.

I was wondering whether I can solve these (N + S) equations by Maple to find the variables (πx , -N ≤ x ≤ S ) based on the parameters?

These (N + S) variables indicate the steady-state probabilities in the system.

On the main page for the Rubi rule-based integrator, there is a table comparing results of Rubi against Maple and Mathematica.

On the face of it, the Maple results don't look so good. Maple is claimed as scoring about 82% correct on the author's example test suite. But only 42% of the suite gets an "optimal" result from Maple. The other 40% that Maple is claimed to get correct have results that are described as "Messy:

I've seen a few posts regarding implicit functions in Maple, but I've not seen any that can help my case...

(I should point out that I am new to Maple as well).

My function is hc=[1/(2π*(√2)*a*f2)]*ln(hc/4), and f=(a0-a)/a0

I have managed to get so far- Maple has accepted the function as an equation, and I want to plot hc as a function of f, which, as you can see, varies according to a. I've tried...

Hey
I have just started with maple and I it is a little bit confusing for me  an I am tryin to implement the sieve of eratosthenes algorithm

but I am still getting strang warnings and the programm does not function as wanted so i wanted to use the debugger but
it is not working(it is like disabled)
I have maple 12
I will be glad to get a help
thanks 

 

Hi,

A while back, I was trying to use Maple's NonlinearFit function, but I kept getting an error regarding the input.  Any help you might be able to give me would be appreciated.  Thanks much.

Y := [96, 183, 290, 472, 711, 1191, 1746, 2573, 3507, 4410, 5133, 5597, 5948, 6294, 6408, 6511, 6559, 6596, 6618]

Hey there,

 

So I'm trying to throw into Maple for analysis the Cauchy problem:

g := piecewise((t, y) <> (0, 0), 4*t^3*y/(t^4+y^2), (t, y) = (0, 0), 0)

y(0)=0.

Is this possible? I'm investigating Uniqueness/existence on it (even though I know the solution already, given that it's Bernoulli in dt/dy with general solution: y(t)=c^2-sqrt(t^4+c^4)  , c is an element of the reals.

I've done some googling and looking around...

assignment_3_with_er.docx

 

I typed this file above exactly as my professor gave us but, I received this message, and the link to the website has no help for this.  Can someone help his or my resolve my mistake?

 

 

Hello to all,

 

I have a chunk of letters, numbers and others symbols like in this extract:

.....XRIH*zAv/(z*Bf3)+3*AkQ4xBpTbCYJVq6qCRRUYJy1aBvSjuQXp+zr6kmMEuNR+9*u9zugTalYwXJA*mBhaiM+8*WrkyyflSAs0JssjHLArZ+l5M1sWtcMznmkmu1+NmmSb7dsacr3qJkzQH*dE3yQlI0Ly2RGa1*Yr/ZlvZFCwCiQyVTQ2GflsnOBZTf05W4Ul35uZMHFxhy1tipPyK+iHfus/mJVhEeluq9vtVzEzwbPWav+w11/ii14f78yXqsqH+XU2m....

My goal is to be able to enter that chunk into Maple for character manipulation like searching if, for example, Qxp+zr6km is part of that chunk as is (and if possible his location).  Since there is some "+", I can't define it with chunk :=.  The source is a *.txt file.  Maybe a readdata?

I am quite busy for the moment so is there someone kind enough to help me.

Thanks in advance

Is there a name for offset correlated data? 

For example

a:=[1,2,3,4,5,6,7,8,9,8,7,6,5,4,3,2,1,2,3,4,5,6,7,8,9,8,7,6,5,4,3,2]:
b:=[5,6,7,8,9,8,7,6,5,4,3,2,1,2,3,4,5,6,7,8,9,8,7,6,5,4,3,2,1,2,3,4]:

Correlation(a,b)
                            0

However there exists a correlation of -1.000 only 4...

Dear Kamel Boughrara

Hi

I am grateful for your attention to my problem.

I have not the special boundary condition for phi[2](r,theta) and phi[4](r,theta) at this stage of process of solution. In fact, these functions are auxiliary functions to decouple high-coupled another PDEs.

 You tried to explain the stages of solution.  I ask for you to perform (write all requisite commands...

by trying to solve the following system of equations:
sys := {V[0]*(diff(P[0](t), t))/(k[B]*T0) = -z*C*A[1]*P[0](t)*(P[1](t)/P[0](t))^(1/gamma)*sqrt(2*gamma*(1-(P[1](t)/P[0](t))^((gamma-1)/gamma))/((gamma-1)*k[B]*T0*m0)), V[1]*(diff(P[1](t), t))/(k[B]*mu[T][1](t)) = z*C*A[1]*P[0](t)*(P[1](t)/P[0](t))^(1/gamma)*sqrt(2*gamma*(1-(P[1](t)/P[0](t))^((gamma-1)/gamma))/((gamma-1)*k[B]*T0*m0))-C*A[2]*P[1](t)*(P[2](t)/P[1](t))^(1/gamma)*sqrt(2*gamma*(1-(P[2](t)/P[1](t))^((gamma-1)/gamma))/((gamma-1)*k[B...

I am trying to calculate something but my computer(dual-core with 4GB memory) is too slow/old for it.

just copy and paste these into a new blank Worksheet Mode document and Edit->Execute->Worksheet and then post your result here. Thanks in advance!!!

G := [a[1]*(y[0]^2)-y[1]^2*a[1]-a[1]*(y[3]^2)+2*a[2]*y[0]*y[3]-2*a[3]*y[0]*y[2]-a[1]*(y[2]^2)+b[1]*y[0]+3*y[1]*(y[0]^2)+y[1]*b[0]-y[1]^3-y[1]*(y[2]^2)-y[1]*(y[3]^2)+c[1]+b[2]*y[3]-b[3]*y[2], -2*a[1...

Hey, I've been trying to calculate the mean from a set of measurements I took in an experiment. The measurements are (76.0,75.9,76.1,75.9,76.0,76.1,76.1,76.0,75.9,76.0,76.0,75.9,75.9,75.9,76.0,75.8,76.0,76.0,75.9,75.9,75.9,75.9,75.9,75.9,75.9,76.0,75.9,76.0,76.0,76.0), and I always do

y1:=(all of the measurements I just listed);

then I try to do the mean of y1

Mean(y1);

but everytime I try this an error comes up. 

Error, (in Statistics:-Mean...
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