I tried to solve the following nonlinear equation system:

with(Statistics):

Y9 := RandomVariable(LogNormal(a, b)):

solve({mu=Mean(Y9),(sigma)^(2)=Variance(Y9)},{a,b}, UseAssumptions) assuming a::real, mu::real, sigma>0, b>0;

The problem is that the conditions, which discriminate between the cases of the piecewise solution are puzzling, not to say impossible to meet.

E.g. at the end of the first row it says:

hello, I make some code about NURBS.

Till NURBS curve and surface I did. These shapes are came from parametric equation.

Nurbs curve is...

plot([F(t),G(t),t=0..1]);

and NURBS surface is

plot3d([F(t,p),G(t,p),R(t,p)],t=0..1,p=0..1);

so I tried to make solid also by using 'implicitplot3d'.

But it does not support parametirc equation.

For example, implicitplot3d([F(t,p,s),G(t,p,s),R(t,p,s)...

I try to solve a nonlinear ode system. in numerical calculation it always calcualte the second derivative of my variable zero, while in the plot of the first derivative on the variable it shows that the second derivative has not to be zero

here is my problem:

My variables are a(t), phi(t). Bty solving the system of ode1 and ode2 and plotting a(t) and its first and second derivateive we see that its second derivative is always zero whime from the graph af its...

When typing in mapleprimes there is a delay when you type.  I am on dial-up so if you highspeed users think it's slow, it is.  Fixing this problem will help speed up high speed users too.

William fixed this issue a while ago but this problem has come back about a week ago or more.

I am using Maple 14 in Windows xp.

If you enter an equation, or expression into a table the screen display shows more than adequate amount of blank space remaining in that particular table row.  However, when you look at the document in print preview or after printing it out you find that the free space in the row is not correctly displayed.  This is by no means subtle.  For example, I enter an equation into a table and it looks like at...

I want to differentiate the following (example) sum with respect to each variable.

foo:=sum(x[i]^2,i=1..3);

By hand I solved it like that:

g1:=diff(foo,x[1])=0;
g2:=diff(foo,x[2])=0;
g3:=diff(foo,x[3])=0;
solve({g1,g2,g3}, [x[1], x[2], x[3]]);

This works for i=1..3 but later I want to have it approach infinity. I don't have that much time to do it by hand -- what's a cleaner solution?

I would like to express a matrix in a neat(er) form.  For example, both matrices;

Matrix([[1/4, 1/2], [1/2, 1/4]]);

(1/2)*Matrix([[1/2, 1],[1, 1/2]]);

return the same thing.  I would like maple to print the latter with the factor 1/2 preceding the matrix for better clarity.  Is there a simple command that will do this?

Cheers in advance.

Rob

I was trying to evaluate a difficult integral on maple analiticaly but after about 5 minutes its output is the integral itself. Something like a=a; is it timing out? How can I change this to let it run for a longer period of time? Also I doubt that there is an analytic solution, so I tried to do a numerical computation, with the assumption that (a>0), and it gave the following output:

Also the original expression that Im trying to integrate...

Are there a way to this in calculate this in Maple?

I have a system of linear equations, with two equations:

x[1]+x[2]+2*x[3] = -5

x[1]+x[2]-2*x[3] = 3

a) Find one solution to this nonhomogeneous equationsystem? The answer need to be in vector form.

b) Find the "complete" solution to the homogeneous equationsystem? The answer need to be in para mite based vector form.

What's the API for the MapleCloud?

Would it be possible to upload/download/otherwise-talk to the MapleCloud without using the Standard GUI's palette? If so, how? In particular, could it be done using the Sockets package?

How do I find find an invertible matrix P and the diagonal matrix D such that A=PDP. Are there a Maple command that can do that. I need it to an Maple T.A. exam.

A= 

(−3 0 6)
(0 -3 −6)
(0 0 3) 

  restart; interface(version);
  Digits:=14;
  Classic Worksheet Interface, Maple 12.02, Windows, Dec 10 2008 Build ID 377066

                             Digits := 14

  Psi(1/8): 
  %=convert(%, Sum); # compare the FunctionAdvisor as well ...
  evalf(%);
 
  ...

hi, i would like to know if the classic interfase of maple 12 or higher would work

reasonably well with the 1.4GHz Intel Core 2 Solo SU3500 processor, 2GB of RAM.

if not, what would be the minimum requierments in terms of processor.

thanks,

santiago

As an example, how can I overlap the timing of these two pointplots in the same plot?

with(plots);
a := animate(pointplot, [[[3, 2], [2, 5], [5, 2], [5, 5]], transparency = A], A = 0 .. 1);
b := animate(pointplot, [[[2, 2], [4, 5], [3, 2], [3, 3]], transparency = A], A = 0 .. 1);
display(a, b, insequence = true, view = [0 .. 10, 0 .. 10]);

I want the second plot to appear 2 seconds later as the first plot is still fading away.