The subs command uses variables assigned to values that sub into an equation so the original equation being subbed into is not changed.  Wouldn't it be nice to assign variables during a subs command as well?  I don't really think it adds any value but it would make the command a little more versatile. 

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Hi
I am facing problem with maple. I try to get a asymptotic series of a transcendental equation but I get failed again and again. If You people could help me.

I am waiting for ur kind responce.

Thanks

Hi,

This is a bug in v13.01 (I haven't yet tried 13.02). I'm not sure it's related to the proc or recursion but using "Sum" instead of "add" in this case yields the wrong result. I have used "Sum" in recursive definitions before without a problem but this particular one reveals a bug. Given the recursive function:

I'd like to start by thanking all those readers who left feedback on my last post. It was good hear that most of you enjoy reading my posts and that they are generally helpful. I would like to encourage you to continue posting feedback, especially questions or comments about anything that I fail to explain sufficiently.

The following is a discussion of the limitations of parallel programming in Maple. These are the issues that we are aware of and are hoping to fix in future releases.

I have two sets A={a,b,c} and B={w,x,y,z}. I have to make sets like following

{(w,{a,c}), (y,{a,b,c}), (z,{b})}

 How I can know the total number of such sets from A and B?

Maplesoft has just released a collection of new engineering products, including MapleSim 3, the latest version of our physical modeling tool. It includes a new hydraulics library, more electrical machines and improved solvers which expand the scope of models it can handle. It also comes with a new project manager, more diagnostic tools, a 3-D visualization preview feature, and other improvements to the interface which reduce the development time. See What’s New in MapleSim 3 for details.

Maplesoft has just released the Maple 13.02 update. This update includes:

• Platform support: Windows® 7 is officially supported with Maple 13.02
• MATLAB® Connectivity: Improved performance, connectivity extended to MATLAB R2009b, and support for the MATLAB Link on 64-bit Macintosh® Intel® platforms
• Language packs: Expanded support for Traditional Chinese and improved Spanish translation
• Plotting: Improvements to EPS and PDF export and improvements to plotting on Macintosh
• Other enhancements: Improved event handling in dsolve/numeric, better handling of read-only documents on  Mac OS® X 10.6 (Intel), and improved support for multithreading

This blog post does not really have that much to do with Maple a little bit about mathematics though.

I started to play around with www.stumbleupon.com/   and some quite nice things came out from it
 

For example :    www.financialsense.com/editorials/casey/2008/1210.html

I have not yet research the accuracy of such made claims but the below charts certainly makes you think....

A leading motorcycle manufacturer has been using MapleSim to model their powertrain, and now they want to include a realistic battery model. This would let them choose batteries and accessories (like starters and alternators) that they can simulate under a variety of operating conditions, along with their powertrain model. The company turned to Maplesoft to help with this modeling exercise and I was put on the task. My background is in circuits so I thought this would be a straightforward project. In my mind batteries were just constant voltage sources that eventually ran out of charge. I was able to find several recent research papers on battery models, and I realized their behavior was much more complicated than a simple voltage source.

I noticed that maple's command Transpose can mean two different things:
 

ListTools

The Transpose function transposes a list of lists
 

LinearAlgebra

The Transpose function computes the transpose of a Matrix, Vector, or scalar.
 

To highligt this I have selected two examples:

This first situation may or may not be a bug.

restart;

Student[Calculus1][CriticalPoints](x^2, x=-2..2);

interval := -2..2;

Student[Calculus1][CriticalPoints](x^2, x=-2..2);

Student[Calculus1][CriticalPoints](x^2, x=interval);

Notice the change in output when the variable "interval" has a value.

The second situation is definitely a big problem:

restart;

ode1:= diff(y(x),x) = y(x)*(y(x)-1)*x;
ode2:= diff(y(x),x) = y(x)*(y(x)-1)*(x-a);

I just published an update to the script that inserts automatic links to the online help. This fixes several issues with the regular expression used to determine when and where to place the links. So now ?PDEtools[diff_table] ?sum,details and ?implicitplot3d all will be linked correctly.

Here is a simple bug:

If I define a function f via

>f:=x->solve(-x*(x+1)+y^(2/x),y);

I can plot(f(x), x=0.2..5) and evaluate f(3) but plot(f,0.2..5) yields an error message ( wrong argument  (f) in plot) and f(1.5) crashes Maple 12–connection to kernel lost.

If I define the function using fsolve or using unapply as in
> g:=unapply(exp((1/2)*ln(x^2+x)*x),x);

I can plot(g,0.2..5) or plot(g(x),x=0.2..5) or evaluate g(1.5) without problems.
 

Any idea whee the bug is?

This is something I produced for my Calculus students.  It is based on some actual research in Biology by Larry Dill of Simon Fraser University, showing that the escape response of the Zebra Danio, a small tropical fish, is triggered when the rate of change of the visual angle of a potential predator becomes too large (see ugrad.math.ubc.ca/coursedoc/math102/keshet.notes/chapter11Notes.pdf, section 11.2).
Here's my Maple document.

What are some good 3rd party add-ons for maple? 

Maple Advisor Database?  it's a little dated but I think a nice addition.  or Aladjevs library for Maple 2.2013 ? - what does this really add to Maple that it doesn't already have? 

Any comments on those or some other good suggestions?