Ten years ago, I wrote an article for Dr. Dobb’s Journal on Analytical Computing. Many of the techniques I discussed there, like hybrid symbolic-numeric computing and automated code generation have since revealed themselves as indispensable tools for engineering. Others, like exact computing, have yet to reveal their potential.

 A lot has happened since that article, of course, and it’s about time I share some thoughts about what the current challenges are. There are three areas that are top of my mind and that I would like to discuss here: Parallel computing, collaborative software and user interface abstractions.

The Search facility for Mapleprimes is broken. Recent posts containing the relevant keywords are not being returned in search results.

For example, searching for either Azul or Rossler does not return a match with either relevant, matching post currently on mapleprimes' front page.

It appears as if the searchable terms database is not being updated with recent results (since the last mapleprimes system overhaul. some months ago?!).

The Maplesoft corporate blog has seen the addition of many interesting new posts recently, and I thought I'd share a few of the most recent ones with MaplePrimes.

Visualizing a Parallel Field in a Curved Manifold
Posted by Robert Lopez, Maple Fellow

Speaking of Languages...
Posted by Tom Lee, Chief Evangelist

An analytical model of mornings in the Wright household
Posted by Derek Wright, Application Engineer

I’ve always been a big fan of languages and even a bigger fan of those who readily master multiple languages with relative ease. My late brother was a linguist with a minimum of five or so distinct languages in his portfolio. Yes, there were many things that I thought I could do better, but that one gift of his was the thing that I would remember him by as time went on.  The other day, my son Eric asked me for advice on what courses to take in Grade 10. He essentially had three electives and, as with most public schools in our country, there were countless choices, all of which sounded tantalizingly interesting and enriching. In the end he came to the conclusion (OK, I drove him to the conclusion), that French, German, and Computer Science would be the right choices.

I’m not a morning person. Well, that’s not entirely true: I am not particularly a morning person, but relative to my wife, Amy, I seem awfully crusty and curmudgeonly for about an hour after waking up. She, on the other hand, is definitely of the “up and at ‘em” variety. As such, I would like to credit coffee with contributing significantly to our happy marriage these last five years.

With so many data points I can now reliably say that it is in everyone’s best interest for me to wake up first, or for us to wake up at the same time. If Amy gets up first, by the time I wake up she is reciting lists of “things I’d like to do today” as I groggily attempt to get that first double espresso to my lips. This is where something interesting happens: If I don’t perk up, Amy gets extra happy in an attempt to cheer me up (just give me time to wake up!). This implicitly suggests that she is using her mood as a forcing function to my mood. If I still don’t perk up, then things turn ugly as I am clearly being insensitive to her generous efforts to cheer me up, and her mood drops. Conversely, if I do perk up, whether from the coffee or her cheerfulness, all is well.

i have two quotes :

#1:

You confuse science with engineering, publication with patents. Intellectual property law does not recognize ownership of scientific truth. Your theory is true, or it isn't. You don't 'own' it. An apple does not need Isaac Newton's permission to fall to the ground. The primary protections for inventions are trade secret and patents. The primary protection for other intellectual property is copyright, and wise choices in how you use it and publish it.

This is a collection of Maple product brochures.  There are some missing, please feel free to add the missing ones to this somewhat historical collection.  I've attached a small visual of the brochures and a link to download the pdf if you wish.  Again please feel free to help me complete this collection.

The ones I am missing are all brochures before Maple 6, Maple 7, Maple 8, and Maple 9.  I will add the most recent ones after Maple 10 later, but I've started this to get things rolling.  I would hope this blog will at some time in the future contain a complete collection, however, with the internet changing, advancing everyday and the need to purge old files, it could be very difficult to source older information... good luck and enjoy. 

Maple 6 - product brochure

Download 8990_Maple 6 anchor.pdf
View file details

Maple 9.5 

Download 8990_Maple 9.5 Whats new.pdf
View file details

Maple 10 

Download 8990_maple10_datasheet1.zip
View file details

It has been a while since my last post.  I'm sorry about that, but I have been busy trying to the fix bugs reported as part of the Maple Beta program.  I'm also running low of good parallel programming topics.  So, as always, if you have topics you'd like to hear about (or hear more about) feel free to ask.

Today I am going to post a brief note about a blog that I find quite interesting.

Cliff Click Jr's Blog: http://blogs.azulsystems.com/cliff/

Q1) Why doesn't this subthread show up when putting MPFR in the Mapleprimes Search?

Q2) How does Maple make use of these?

> # on a system with `ls`
> system(cat("ls ","bin*/*mpfr*"));
bin.APPLE_UNIVERSAL_OSX/libmmpfr.dylib
bin.APPLE_UNIVERSAL_OSX/libmpfr.1.0.0.dylib
bin.IBM_INTEL_LINUX/libmpfr.so.1
bin.IBM_INTEL_LINUX/libmpfr.so.1.0.0
bin.SUN_SPARC_SOLARIS/libmpfr...

It was 1992 when Mel Maron and I had just published the third edition of Numerical Analysis: A Practical Approach.  One of our editors made the suggestion that a Maple version of an advanced engineering math book should be written. For the next five years I steadfastly resisted the challenge.  Finally, in 1997 I signed a contract with Addison Wesley for a 1000-page AEM text, the manuscript due in two years. 

 Rose-Hulman Institute of Technology where I was teaching in the math department is on the quarter system, and math faculty normally teach twelve contact hours.  Calculus classes are five hours per week, so for each calculus course taught, a faculty member picks up an extra hour.  To minimize prep time, I wrangled three courses all the same, but they had to be calculus courses, so I was teaching fifteen contact hours and writing what turned out to be a 1200-page text. 

After the first two quarters of academic year 1997, I needed to come up for air, so I set aside the project and spent several months putting together a Maple-based tensor calculus course. Happily, I even got to teach it in the following school year. One of the high points for me was animating a parallel vector field along a latitude on a sphere.

I've spent two days trying to figure out why Maple won't allocate more than 512 MB of memory on my Mac. I've checked all the forums here an on Apple and it seems that this is a problem which has been around for at least two years, without being properly resolved. Previous posts can be found here:

http://www.mapleprimes.com/forum/memoryproblemsmac

http://www.mapleprimes.com/blog/mathgeek/macandmaplekernelissue

Here is the Rossler system, one of the simplest examples of 3 dimensional deterministic chaos (under certain conditions according to "params"). Thanks to Doug and Joe for various assists. Comments and critiques most welcome !

restart;
interface(displayprecision=10):
ross_x:=diff(x(t),t)=-y(t)-z(t):
ross_y:=diff(y(t),t)=x(t)+a*y(t):
ross_z:=diff(z(t),t)=b+x(t)*z(t)-c*z(t):
rossler_sys:=ross_x,ross_y,ross_z;

#Find fixed points:
sol:=solve({rhs(ross_x...

See the following PDF for the geometry of the MRB constant.

http://www.marvinrayburns.com/what_is_mrb.pdf

If you have any questions, I would like to hear them.

Marvin Ray Burns

Please let me know if Maple 11 will work in 64-bit Windows 7, and if there are any compatibility issues.

I'm moving my Maple from 32-bit Windows XP to a new 64-bit Windows 7 system.

Thanks,

Tim

Here's a simple rocket model