Below is my code for solving a solution of three first order ODEs using the 4th-order Runge-Kutta method.

I have been able to successfully plot the solutions of each of the ODEs (x,y,z) against time t, however I am struggling to produce a plot in the three dimensional phase domain of x,y,z. Could anybody suggest what commands to use as everything I have tried (plot, plot3d, implicitplot3d etc) has produced an error. 

h:= 0.01:
N:= 200:
x:=Vector(N+1):

if given a permutation group

1 2 3

2 1 3

How to calculate the cycle factorization and type of permutation group f in polya counting in maple

with(Statistics):

F := ((1/6)*z+(1/3)*z^2)/(1+(1/6)*z+(1/3)*z^2);

Dist := subs(z=t,F);

RealDist := Distribution(CDF = unapply(Dist(t-1),t)); # using this Distribution for Maple DistributionX:=RandomVariable(RealDist); # Random Variable

Pgraph := DensityPlot(X, range = -1 .. 1);

A := Sample(X, 1):

when i look help example, it has a very high range 3500,

when i want to change the range to small , it run very long time at Sample function like endless

F := ((1/6)*z+(1/3)*z^2)/(1+(1/6)*z+(1/3)*z^2);

Dist := subs(z=t,F);

RealDist := Distribution(CDF = unapply(Dist(t-1),t));

X:=RandomVariable(RealDist);

CommonDensity := PDF(X,t);

F do not have D(t) but density have D(t) , what is D(t)?

i have this:

u:=[a=x,b=w];

p:=[1=4,3=2,5=2];

How can I write a procedure which produces following:

[u(a)=x,u(b)=w],[p(1)=4,p(3)=2,p(5)=2]

Problem is extracting and then using variable name inside the printing. regards

So, I have to minimize only one variable, but with totally insane constraints. For simplicity, I want to solve it only for n=4 and specific graph, so it will be a little bit easier than described below.

1n is a column of "1".
So, is it possible at all? I spent almost 5 hours, tried everything that is possible to google, but still can't run it. Here is what I've done(as 'D' is reserved, I used 'B' instead):

a := .4*x^3+.3*x^2+.2*x+.1;

z^coeff(b, x^0);

it should be z^1

however can not run this, how to get this constant term 1?

Dear Experts,

I have an equation which needs to be simplified. However it is mostly in Bessel I and BesselK. To simply it I have used the simplify( expression,

Can somebody explain me this:

http://www.maplesoft.com/support/help/Maple/view.aspx?path=LinearAlgebra/ToeplitzMatrix
http://en.wikipedia.org/wiki/Toeplitz_matrix

in wiki it started from 1 at [1,1] if using below

however maple package started from 5

restart;

x := 1;

y := 3;

input := [1, 2, 3, 4, 5, 6, 7, 8, 9];
with(LinearAlgebra):

T1 := ToeplitzMatrix(input, 3);

T1 := Transpose(result);

restart;

x := 1;

y := 3;

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

Goal is writing this matrix

Matrix([[seq(a[k], k = x .. y)], [seq(a[k], k = x+1 .. y+1)], [seq(a[k], k = x+2 .. y+2)]]);

when i shorten above hard code writing into this

seq(Matrix([[seq(a[k], k = x+m .. y+m)]]), m = 0 .. 2);

i failed to make a matrix, convert(,list) failed

I created a null tetrad, but Maple's GRQuery returns false.  Here is the code:

Hi,

I'm trying to compute the mean and variance of a custom discrete random variable, as indicated in the file below (well, I do know its mean and variance, but I need the variable in a more complex context). Defining it is no problem at all, but when I parse Mean(Y) and Variance(Y), a weird expression shows up, despite my random variable being really simple. Does somebody know what goes wrong?

am having my graph in points but i want it to plot surface from these points 2d_curent_heating_fd.mw

please let me know which commands to use here

sol := solve(f);

sol := [3, 1+2I, 1-2I];

would like to consider 1+2I and 1-2I is the same thing

however repetition not work in this case

would like to check this in if statment and count add one when meet this condition

as there are many equations to check