> m1 := 1000;
                              1000
> m2 := 250;
                              250
> m1A := .2;
          ...

In my class we need to know how we can double underline our answers and how we can use the ⇕ (DoubleUpDownArrow) in equations

We would be happy if you have the answers we are searching

Regards Henrk Sigsgaard

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;

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 h_c=[1/(2π*(√2)*a*f²)]*ln(h_c/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 h_c 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.

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...

restart; interface(version); # Maple 15
Digits:=40;

# symbolic expression
t:=1/292/(-77796+62196*I*3^(1/2))^(1/3)*73^(1/2)*
  ((-77796+62196*I*3^(1/2))^(1/3)*
  (-3*(-77796+62196*I*3^(1/2))^(2/3)-
  7812+688*(-77796+62196*I*3^(1/2))^(1/3)+
  3*I*3^(1/2)*(-77796+62196*I*3^(1/2))^(2/3)-7812*I*3^(1/2)))^(1/2)
  -0.3; # <--- does that give the trouble ?

simplify(t); # makes it a float ...

  0...

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

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...