I'm seeing strange behavior when I try to numerically solve the heat equation with radiative boundary conditions (heat flux proportional to 4th power of surface temperature).  I set up a simple example of a plate that sees 300K on one side and 310K on the other.  Two obvious flaws in the solution of the radiative example are that the slope of the curve always has the wrong sign at the left boundary (sometimes wrong on both boundaries), and that the solution runs away...

I WAS WONDERING IF ANYONE COULD HELP ME OUT... I DOWNLOADED A STRUCTURAL MECHANICS PACKAGE THE OTHER DAY FROM THE MAPLE APPLICATION PAGE.... I KNOW I CAN RUN EACH OF THE DOCUMENTS INDIVIDUALLY BUT I DON'T KNOW HOW TO CALL THEM UP IN THE PROGRAM.. CAN ANYONE GIVE ME STEP BY STEP INSTRUCTIONS OF HOW I CAN INSTALL THE PACKAGE IN MAPLE 13..

THANKS IN ADVANCE!!!

Hi,

I have purchased an e-book for Maple called "Advanced Engineering Mathematics". I have found it to be full of red code text (which I understand to be 1-D Maple format, correct?).

Is there a way of converting the contents of my e-book to get rid of this red text (or at least convert it to something more meaningful) ?

Thanks and regards,
Andrew J Fortune,
Melbourne,
Australia

When I write

evalf(Pi);

I get  3.14159...

But, when I want to visualize the value  "e", after writing 

evalf(e);

I get       e .

Why I cannot see the digits of "e"?

Did I instal not properly my Matlab14.0?

In a loop (variables set to some calculation) when maple produces an error how can I set it to a value of zero?

As some of you know, I'm hoping to, some day, find a closed form expression for the MRB constant.

 Here is my latest little nugget.

Let x=MRB constant.

 = log(x) with an error< ...

I want to find the first positive and first negative root of a bessel function

j2 := (x, a) -> k(x)^2*a^2*(diff((diff(1000000000*sin(1/1000000000*k(x)*a)/(k(x)*a), x))/(k(x)*a), x))/(k(x)*a)

I couldn't use the built in bessel function with two variables, so I had to enter it by hand.

I want to find the values of x where j2 is zero as a function of a:

f := (a) -> RootOf(j2(x, a), x, 0 .. 2)

plot(f(a), a = 2 .. 2.25, y = -3 .. 3)

Hey folks. I have a massively complicated equation I'm trying to solve and the internal memory can't take it.

Here is the problem.

Let f(x) := 1 - lambda*x^2

alpha := 1/f(1)

By solving the following equation,

alpha*f(f(x/alpha)) = f(x) + O(x^4)

We can determine a value of lambda and hence alpha (for which the real value is roughly -2.5 and the calculated value here is roughly -2.7).

hello everybody

please heeeelp

I ran an advanced search in the application center at maplesoft and I'm not sure that it works properly.

Under advanced search I left the search field blank and selected MapleV to find all applications submitted for MapleV.  The first thing that happens is that it comes up with applications rated for newer versions of Maple.  Then it asks to click here to search our archived Maple-related applications (prior to Maple 10).

So I do that but it only produces...

hello everybody can you help me please

how can i canvert this list [1,2,3,4,5,6] to a number 123456

hi ,friends

  now ,i get a matrix of symbolic expression,it's difficulty to find the simplest forms using the common command  as like simplify or combine

p := Matrix(4, 4, {(1, 1) = (1/2)*exp((1/2)*J[1]-(1/2)*J[2]+(1/2)*J[3])+(1/2)*exp(-(1/2)*J[1]+(1/2)*J[2]+(1/2)*J[3]), (1, 2) = 0, (1, 3) = 0, (1, 4) = (1/2)*exp((1/2)*J[1]-(1/2)*J[2]+(1/2)*J[3])-(1/2)*exp(-(1/2)*J[1]+(1/2)*J[2]+(1/2)*J[3]), (2, 1) = 0, (2, 2) = (1/2)*exp(-(1/2)*J[1...

Hello friends,

When I solve the optimization problem with restriction (below):

NLPSolve( ln(x1) +ln(x2+5), {x1 +x2 <=4}, assume = nonnegative);
     [-Float(infinity),

       [x1 = HFloat(0.0), x2 = HFloat(0.8333333333333334)]]

I get the expression  "-Float(infinity)"..

What do Float(infinity) and  HFloat(0.833333) mean?

Thanks for the attention,

Hello everybody!

I'm working on a statistical problem. I need to plot confidence regions for parameters in the model, but I don't know what I should do. I tried to get some programs from the internet, but either they don't work or I don't understand details of them to change for my work. Can someone introduce a good program to me?, or does anyone have another useful idea for me?

Thanks a lot!

I meet a problem in the use physcis package.

    for example,

                                   restart;  with(Physics); Setup(mathematicalnotation = true):

                  ...