Maple defines the spherical coordinates angle phi from the Z-axis to R, and the angle theta from the X-axis to R.  Many texts and literature define the angle phi the opposite way from the X-axis to R and the angle theta from the Z-axis to R.  Therefore, when I input a problem from a text, which defines phi and theta by the second definition given above, I have to remember to swap the values of phi and theta in order to get the correct answer. 

Is there...

Hi, I am solving an integration. When I use "subs" command to define the value of cl and ct, the result is inconsistant with the one when I define the cl and ct directly by using "cl:= and ct:=". (Why u1test is not equal to u2test in "Comparison #1"?) Please help

result.mw

I am solving a system of equation, and whenever I used the "solve" command, its showing "Warning, solutions may have been lost", The system of equation is like that, Pls help as soon as possible.

e1 := (1/2)*alpha[2]^2+6*delta*alpha[2];

e2 := alpha[2]*alpha[1]+delta*(10*alpha[2]*lambda-20*alpha[2]*d+2*alpha[1]);

e3 := -V*alpha[2]+(1/2)*alpha[1]^2+alpha[2]*alpha[0]+delta*{8*alpha[2]*(d^2-lambda*d+mu)+3*alpha[1]*(lambda-2*d)+(4*alpha[2]*lambda-8*alpha[2]*d)*(lambda-2*d)};

How can I use the command outputs DEtools [convertsys] for solving the system of differential equations? I know that maple can solve the system directly. But most of the examples can be seen in other systems (MathCad, MatLab ..) reduce the system to a system of first order equations. And I would like to implement, "translate" into Maple in this way. Is there a command that allows it? Do I need to implement a procedure?

GRACIAS

I am playing around with the PolynomialFit command in maple.
If I want to get a return of 1% then I can simply plug in the return at time t
for v in the expression below. That works for all different returns.

consider:

assume(kf2>0,q<kf2,q>0);

(PIECEWISE([0, -ln(q)+ln(kf2) < 0],[1, otherwise]));

simplify(PIECEWISE([0, -ln(q)+ln(kf2) < 0],[1, otherwise]));

i think i shall get 1 after the simplification... but i cannot...what should i do to achieve that "simplification"

consider:

assume(kf1>0,kf2>kf1,q>kf1,q<kf2);

1/2*q*Pi^2*(ln(kf1)*kf1^2-ln(kf2)*kf2^2-ln(q)*kf2^2-arctanh(1/(kf1^2+q^2)^2*(kf1^4+q^4-6*q^2*kf1^2))*kf1^2+ln(q)*kf1^2-ln(2)*kf1^2+ln(-kf1+q)*kf1^2+ln(kf1^2-q^2)*q^2-ln(kf1-q)*q^2+2*kf1^2-2*q^2-1/2*ln((q-kf2)^2)*kf2^2+3*ln(kf2+q)*kf2^2+4*q*kf2-3*q^2*ln(kf2+q)+ln(2)*kf2^2+arctanh((kf2^4+q^4-6*kf2^2*q^2)/(kf2^2+q^2)^2)*kf2^2+ln(-q+kf2)*q^2-ln(kf2^2-q^2)*q^2-4*q*kf1-3*ln(q+kf1)*kf1^2+2*arctanh((-kf1^2+q^2...

Hi all! 
Is there any possibility in Maple to perform symbolic operations with arbitrary matrices (possibly given only the size of the matrix or it's structure (block matrices, diagonal matrix and so on)). For example, I would like to obtain the following results (input -> output). 

Possible code: 

assume(A, Matrix(n)): assume(B, Matrix): assume(E,IdentityMatrix(n)): 

Hi, could anyone please explain or show me where to find what is the difference when I use "Int" and "int" for my calculations please? Thx

I tried to use multiple light sources with transparency for 3D plots and could not get it to work.  There are indications in the plot,structure help that this is supposed to be possible.  I have attached a worksheet that demonstrates some of the problems with the "light" and "LIGHT" options for 3D plotting.  Much of the output has been removed since the graphics take so much space.  The same plots are generated in both Windows and Linux.

Does anyone...

In the LinearAlgebra packet, I use the command MatrixFunction to calculate a function with respect to a matrix J as follow:

> restart; with(LinearAlgebra);

> J := Matrix(3, 3, {(1, 1) = 2, (1, 2) = 1, (1, 3) = 0, (2, 1) = 0,
 (2, 2) = 2, (2, 3) = 1, (3, 1) = 0, (3, 2) = 0, (3, 3) = 2});

> M := MatrixFunction(J, ln(1+x), x);

Then I got the answer:

Matrix(3, 3, {(1, 1) = ln(3), (1, 2) = 1/3, (1, 3) = -1/18, (2, 1) = 0, (2, 2) = ln(3...

Hello,

Complete newbie here and have being reading for the last two days.

A question that I Googled a *lot* before asking and gave up.

I have this:

Dh :=  (a, Db, b, g) -> a*Db*sqrt(tan(b)^4/(cos(g)^4*(tan(g)+tan(b))^4)+tan(g)^4/(cos(b)^4*(tan(g)+tan(b))^4)) 

I am jsut a beginner!

I was trying to get the numerical value of e^10,

but Maple did not show me the approximate commond. How to get the numerical value of this ?

Hello,

(sorry if this appeared elsewhere, but it seems my first try to ask this failed)

I tried to use Maple last night to do some heavy computational work, but it turns out (I let him print time()) that he was only active for about an hour.  He did not do anything when my Macbook Pro was on stand-by.

This morning, when he woke up, he was unwilling to stop!  I pushed the "Interrupt the current operation" button...

if my eqsn is x^4+x^3+x^2 . i can take a common factor x^2 ,then the eqsn will be x^2(x^2+x+1) ...also i can take a common factor of x ...then the eqsn will be x(x^3+x^2+x) ...how can i direct maple about my common factor ...u think this is useless but i have just made my problem simple to ask a qsn so that everyone can understand what i really want to tell