The function pdsolve gives different answers depending upon the way the problem is posed. For example:

> PDE1:=a*diff(u(x,t),t)+b*diff(u(x,t),x)-u(x,t)^2=0;
> ans1:=pdsolve(PDE1);

gives:

> ans1 := u(x,t) = b/(-x+_F1(-(-t*b+a*x)/b)*b);

Whilst,

> PDE2:=a*diff(u(t,x),t)+b*diff(u(t,x),x)-u(t,x)^2=0;
> ans2:=pdsolve(PDE2);

which is the same problem but with u(x,t) replaced by u(t,x), gives:

> ans2 := u(t,x) = a/(-t+_F1((-t*b+a*x)/a)*a);

Both are actually correct solutions, as is easily verified by a call to pdetest.

My query is:

Hi

Generally maple runs smoothly for me but if I have a very large loop then I sometimes find the memory allocation increases & increases until I hit a limit after which maple crashes with a message about "losing the kernel connection".

If a buy a new PC with more physical RAM (current PC has 2Gb) will the problem go away?

I use old style command line maple & have increased the virtual memory allocation as much as it allowed me to.

thanks!

Does Maple support Ternary diagrams that can be used for exploring parameters like thee phase relative permeabilities

 

I just read Paul Weiss' post in which he describes his troubles uploading files to MaplePrimes.

Earlier yesterday (19 Nov 2008) I experienced a similar problem when I was trying to upload a GIF file to include with one of my posts.

In my case, after I selected the file I wanted to upload, I was showed an earlier file that I had uploaded to MaplePrimes. Based on what I see in Paul's earlier post it appears as though he was trying to upload two files and the second file was really just a duplicate of the first one.

For the first time, Cybernet decided to coordinate two more major meetings with the TechnoForum – essentially creating a 2-day multiconference. In contrast to the Maplesoft-centric sessions of the Maple Techno Forum on Day 1, the second day was focused on industry problems and the technological and scientific solutions emerging from various sources.

Maple requires connection to the kernel for calculations.  Does that mean maple uses kernel mode device drivers? 

"Executing commands in Maple requires a connection to the Maple kernel"

What is a kernel, and why does Maple need to access the internet to perform simple commands?  I'm sure I've used maple without the internet before.

Hello everybody, I'd like to write from a procedure results in a table as output. Something like this, that I show at the end.

 

Just to clarify, this is not a post to discuss the character played by Cliff Robertson in the movie Gidget....this is much bigger.  This is to announce who the Maple Prime's Mentor of the Year is.  But before I get to that, I would like to thank all members of the Maple Primes community for their contributions over the past year. I hope that you will continue to be active and contribute regularly to Maple Primes.

In the volume Advanced Programming Guide of the Maple manual, the "clasical" picture of the Maple system architecture is depicted:

 A1: Internal Organization

Components

Maple consists of three main components: a kernel, a library, and a user interface. The kernel and library together are known as the math engine.

Kernel The kernel is written in the C language and is responsible for low-level operations such as arbitrary precision arithmetic, file I/O, execution of the Maple language, and the performance of simple mathematical operations such as differentiation of polynomials.

Library Most of the Maple mathematical functionality is in the Maple library, which is written in the Maple language. The library is stored in an archive, and pieces of it are loaded and interpreted by the kernel on demand.

User Interface The user interface is the part of Maple that the user sees, and is conceptually separate from the math engine. The same math engine can be used with different user interfaces.

However, the architecture of the system has been moving away from this picture for several years already. Eg:

A second parser has been implemented in the Standard GUI, instead of the kernel.

what is the perometer of sa rectangle if the length is 7/10cm and th width is 1/10cm?

Every now and then someone will post here on Mapleprimes and the code will use an older package such as linalg or stats. Quite often it is clear that the poster is new to Maple. Yet these packages have been superceded with new ones, eg. LinearAlgebra and Statistics.

One obvious question that then arises is: how did this user decide to use the older package?

I just did a google search on

It would be nice to have all the collections of applications on the maplesoft application site on a single dvd or cd.  And every 6 months or so make available the newest added ones. 

A while back I posted an article on Maplesoft activities in Japan. As planned, last week, some colleagues and I made the trip to Japan and once again, came back with a bag full of stories and insights – technical, business, social, political – you can never spend a week in Japan and not be suitably impressed and surprised by the latest happenings.

I was in Boston last week attending the ASME International Mechanical Engineering conference demonstrating MapleSim, our new tool for physical modeling.  I had the opportunity to speak to a large number of delegates, but I remember one conversation in particular; a professor who taught freshman students was bemoaning the fact that he found it harder and harder to impress students with his relatively simple animations of physics phenomena.  A simple animated pendulum no longer captivated students who were already immersed in the interactive physics-enabled environments of video games.  He had to escalate the intricacy of his demonstrations, but generating them was starting to consume too much of his time.