## How to find order of element of group in Maple?...

Exercise: Find all the elements of order 2 in D30 .

I set the D30 group , but I do not know how to calculate and list elements of order 2 . I thought of calculating the order of all the elements ( With PermOrder () command , perhaps) , and then use the select command to select those with order of 2. But the big problem is to calculate the order of elements.

I know only calculate the order of the group. Could anyone help me ?

## Test of Rational Roots in Maple?...

I'm trying to create a routine to perform the test of rational roots , but I'm having some problems. Below is the routine I created :

But the program is only printing " aux = -24 " . I don't know what it can be .

I need to modify my code , but I don't know where. Can someone help me? Thank you!

## Cylindrical objects...

Hi Everyone,

I want to draw a 3D cylindrical object with follwoing constraint:

(1) For z=0 to 5, it should be a cylinder with radius 2 units

(2) For z = 10 to 20, it should be a cylinder with radius 8 units

(3) Connecting piece between z=5 to 10 is a type of cylinder such that its radius increses from 2 to 8 as z moves from 5 to 10.

I know how to draw (1) and (2) individually, but can't make a connecting object.

Can anyone help me drawing that object?

## Plot of k*x^2 with different k values...

How can I integrate the value of different k values in the plot function, instead of assigning values to k before giving the plot comman? Can't see anything about this in the help file.

staffan

## How to correct this code with Roots?...

hw2_unfinished.mw

There is something wroung with the t0.

How to correct it?

## problem in procedure...

hello all!

Pascal := proc (n::posint)

local x, y, i;

for i from 0 to n do print(coeffs(expand((x+y)^i)))

end do end proc;
Pascal(4);

1
1, 1
1, 2, 1
1, 3, 3, 1
1, 4, 6, 4, 1

How to create

1
1  1
1  2  1
1  3  3  1
1  4  6  4  1

## How to find such a matrix? ...

hello everybody!

I want to create a random symmetric matrix which have det=2. I just made it like this, no better than those ones. Thanks!

Doixung := proc (n)

local A, i, j; A := Matrix(n);

n := LinearAlgebra[Dimension](A);

for i to n do A[i, i] := RandomTools[Generate](integer(range = 1 .. 20))

end do;

for i to n do

for j to n do

while j < i do A[i, j] := RandomTools[Generate](integer(range = 1 .. 20)) end do;

while i < j do A[i, j] := A[j, i] end do

end do

end do;

print(A) end proc

## What is problem with procedure...

Hello everbody.

Newton:=proc(p[0],TOL,N)

local i,p,f;   i:=1;

while i<= N do

p:=p[0]-(f(p[0]))/(diff(f(p[0]),x));

if abs(p-p[0])<TOL then             return p;     else i:=i+1;            p[0]:=p; end if;

end do;

printf("The method failed after N iterations,N=%d",N);  end proc:

## Problem with plot...

hi all

i have this code and want to plot(NphiB1,y). but it is not plotted.

help me plz

restart:
nB0:=1:
hb:=6.63*10^(-34):
aB:=1/(3*(3*nB0*Pi^2)^(1/3)):
gB:=4*Pi*aB/mB:
xiphase:=1/sqrt(4*mB*gB*nB0):
qcB:=8.26*10^(-3)/xiphase:
qB:=y*qcB:
v1:=-gB*nB0:
v0:=4*gB*nB0:

L:=1.5*xiphase:
k2:=sqrt(qB^2+2*mB*v1):
k3:=sqrt(qB^2-2*mB*v0):
beta:=k3*L:
W:=2*cos(beta)*(qB/k2-k2/qB):
Q:=sin(beta)*(qB/k3-k3/qB+qB*k3/k2^2-k2^2/k3/qB):
P:=sin(beta)*(qB/k3-k3/qB-qB*k3/k2^2+k2^2/k3/qB):
theta1 := -arctan((Q*(-P*Q+sqrt(Q^2*W^2+W^4-W^2*P^2))/(Q^2+W^2)+P)/W):
b1:=(theta1+k2*L)/(2*k2):
Stheta1 := -(Q*(-P*Q+sqrt(Q^2*W^2+W^4-W^2*P^2))/(Q^2+W^2)+P)/(W*sqrt(1+(Q*(-P*Q+sqrt(Q^2*W^2+W^4-W^2*P^2))/(Q^2+W^2)+P)^2/W^2)):
Ctheta1 := 1/sqrt(1+(Q*(-P*Q+sqrt(Q^2*W^2+W^4-W^2*P^2))/(Q^2+W^2)+P)^2/W^2):
phiB1=evalf(-arctan((1/4)*(cos(2*qB*b1)*(sin(beta)*(-qB/k3-k3/qB+qB*k3/k2^2+k2^2/qB/k3)+cos(theta1)*sin(beta)*(-qB/k3-k3/qB-qB*k3/k2^2-k2^2/qB/k3)+2*sin(theta1)*cos(beta)*(-qB/k2-k2/qB))+sin(2*qB*b1)*(4*cos(theta1)*cos(beta)-2*sin(theta1)*sin(beta)*(k2/k3+k3/k2)))/(-sin(2*qB*b1)*(sin(beta)*(-qB/k3-k3/qB+qB*k3/k2^2+k2^2/qB/k3)+cos(theta1)*sin(beta)*(-qB/k3-k3/qB-qB*k3/k2^2-k2^2/qB/k3)+2*sin(theta1)*cos(beta)*(-qB/k2-k2/qB))+cos(2*qB*b1)*(4*cos(theta1)*cos(beta)-2*sin(theta1)*sin(beta)*(k2/k3+k3/k2))))):
NphiB1:=evalf(phiB1/Pi);
#SNphiB1:=simplify(NphiB1);
plot(NphiB1,y);

## Error in procedure...

Hello everbody!

Jacobi:=proc(A::Matrix,b::Vector,x,epsilon,m)

uses LA=LinearAlgebra;

local      i,k,n:= LA:-RowDimension(A),

x:= Vector(LA:-RowDimensions(A)),

p:= Vector(LA:-RowDimensions(A));

k:=1;

while  k<=n do

for i to n while i<>j do

if abs(x-p)<epsilon do return x; end if;

k:=k+1;

p:=x;

end do;

x;

end proc:

## Why doesn't typesetting option work for MathConta...

Why the interface typesettings option doesn't affect the content of a MathContainer?

I opened a new document. Then I inserted the command interface(typesetting=extended); to improve the visualization of a disequation's solution. It works in the worksheet, but it doesn't work in the content of a MathContainer.

## What is wrong with algorithm?...

Hello! I have written a algorithm. Can you help me find errors? thank you very much. sorry, my English is not very good!

LL:=proc(A::Matrix)
uses LA= LinearAlgebra;
local i, j, k, n:= LA:-RowDimension(A),
L:= Matrix(LA:-Dimensions(A));
L[1,1]:=sqrt(A[1,1]);
for j from 2 to n do
L[j,1]:=(A[j,1])/(L[1,1]);
end do;
for i from 2 to n-1 do
for j from i+1 to n do
end do;
end do;
L;

## How to use Ctrl + = properly?...

I want to know the mistakes i have made in the documents attached to get the expected results every time.

 Case 1: control = works fine now.  = Case 2: control = prints answer in next line. =  = control = prints expression and answer in the next line. case 3  =  = Numeric formating does not function in case2 and cae 3. I dont know shat hv i done for these things to occur. But what should i do?

Ramakrishnan V

rukmini_ramki@hotmail.com

## How to solve this system of ODEs?...

I have been using MapleSoft since 2013 to solve mathematical problem. However, I could not solve the following set of differential equations.  Would you please, solve the problem and return the file how you solve it? Thanks in advance.

## Call to plot options without the name...

Is it possible to make a call to any of the plot options without using it's designated name?

I don't know if I'm clear enough but for example