## How do I create several surfaces with restraints i...

Ok hello everyone and thank you in advance.
I have 2-3 difficulties in a maple plotting.
I'm trying to plot two fairly easy surfaces in maple 3d
What I want is:
3 standard axis, x,y,z with y vertical and z coming out of the screen(obviously you can turn it and stuff.)

Two surfaces:
On with y = (1/x), z=free;
The second with y= 2*x(1/z);

## How do I assign a variable to a 2D-Math expression...

Hi all,

I'm editing a scientific document in Maple document mode. I'd like to assign a mathematical result to a variable, which is a 2D-math expression.

An example:

I'd like to assign the result of

to the expression

## Getting Maple to "prove" some trigonometric identi...

by: Maple

I was about to post this as a "How-do-I" question, but while composing my question, I stumbled upon the solution.  In case this "discovery" would be useful, I'm posting it here.

For some coursework, I'm developing fitting sinusoids to experimental data (poor-man's Fourier Analysis).  At one point, I do a "brute-force-least-squares" computation, one step of which involves computing the sum of a sine over N equally-spaced intervals around the circle.  This...

## MRB constant N

Maple

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< ...

## Psuedo Convolution and too many levels of recursio...

Why does:

G := Heaviside(x): int(G(x)*G(t-x), x = 0 .. 3);

Produce a "Error, (in unknown) too many levels of recursion"?

## Error message when trying to plot graph...

Hi!

I'm sure there is a simple solution to my problem, but because I'm fairly new to using Maple, I can't figure out why my graph won't work. All I'm trying to do is graph a function along with its first and second derivatives within the same graph. The original function is f(x)= (2+sinx)^x2/(x2+1).

I defined the function as f and then found the first derivative by using df:=D(f...

## CDECL option in define_external

External calling functions from Windows dlls in Maple uses __stdcall calling convention.

Most Windows dlls including <windows.h> are using that convention (called also WINAPI). However, C runtime dll (msvcrt.dll) and most mathematical dlls - such as gsl, PARI, etc. which would be very useful, are using __cdecl calling convention and functions from them can not be easily called from Maple. One has to create a wrapper dll with __stdcall calling convention for that. In particular, Axel Vogt did that for a part of PARI.

Would that be possible for Maplesoft developers to add option CDECL in define_external in Maple 15 allowing calling C library functions and functions from gsl, PARI, etc. directly from Maple, without a burden of writing __stdcall wrappers for them first?

## Deriving differential equations of motion...

I'm new to maple and am evaluating it as a means of deriving symbolic equations of motion for a system comprising two flexible bodies sliding relative to one another and rotating in 3d space using the Boltzmann Hamel equations.  I have written up the approach but the maths is extremely tedious by hand so I wondered if maple could help.  For  a start how do I define a simple indexed 3 element vector and then create the skew matrix equivalent (tilde matrix) as...

## My experience with Maple

by: Maple 14

My first touch with Maple was in 1997,when I was in my undergraduate course.The software of maple was in three floppy disk.

Since 2000,I becomes a teacher for mathematics .Now I am using it to compute the integrate,limits,etc.

To the world you may be one person,but to one person you may be the world!

## CANDECOMP/PARAFAC: images as tensors of order 3

by: Maple 14

This post is a further development of my earlier question in reply to John's post. I have implemented a basic version of the CANDECOMP/PARAFAC algorithm referred to on Wikipedia and described

## Decompose a third order tensor into pure tensors?...

If you construct the tensor product W of an m- and an n-dimensional vector space, U and V, then you can view the elements of W as m by n matrices (by picking a basis for U and V). The rank one matrices are the elements that can be written as the tensor product of (nonzero) vectors u in U and v in V; this corresponds to writing the matrix as u

## Is there a way to keep the same color used between...

I always change text color, and I want the color in math mode to be the same as the text mode.  Is there a way to do this automatically?  The math mode always comes up in black, even if the previous text was red etc...

Thank you.

## Grading code not simplifying properly... Help!...

Hi,

I've recently started creating questions using MapleTA, and at the moment I've hit a stumbling block.

For a particular question, the students need to enter a formula. When I input the answer in decimal form, the question is graded correctly; when I put it in fractional form, it's not. I've used the simplify command in every perturbation I know, but I can't get it to work.

More details:

Algorithm

## Generating Samples from Custom Probability Distrib...

by: Maple 14

 This is the fourth and final part of a blog post, the first three parts of which can be found here: Generating Samples from Custom Probability Distributions (I)

## Generating Samples from Custom Probability Distrib...

by: Maple 14

This is the third post in a four-part series; the earlier posts are Generating...

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