Personal Stories

Stories about how you have used Maple, MapleSim and Math in your life or work.
Hi everyone! I want to thank Tom Lee for inviting me to join the MaplePrimes community. I feel very enthusiastic about the creative potential of this wonderful collaborative resource and want to take a moment to introduce myself. My first blog post includes a brief biography and states some of my Maple plans and research goals.
I have met several problems trying to install and execute Maple on Fedora Core 4. I begin with Maple 10. Default GUI installation does not work: ============== [root@localhost cdrecorder]# ./installMapleLinuxSU Preparing to install... Extracting the JRE from the installer archive... Unpacking the JRE... Extracting the installation resources from the installer archive... Configuring the installer for this system's environment... awk: cmd. line:6: warning: escape sequence `\.' treated as plain `.' Launching installer... Invocation of this Java Application has caused an InvocationTargetException. This application will now exit. (LAX)
I'm just curious - and I don't work for Maplesoft :) - but what do people here actually use Maple for ? What sorts of problems are you tackling, and what commands/packages do you typically use ? I'm also interested to hear about how people use Maple in teaching (for those that do). Myself I use Maple for research in computer algebra - mostly topics related to polynomial systems. For example, I may be trying to find algorithms to compute in new domains. I like Maple because it is very easy to program mathematical algorithms. It is not quite so easy to get them to run fast, but that gives me something to work on :) I mostly use my own software (PolynomialIdeals + recent code), but I also use the Groebner package and now the RegularChains package (new in Maple 10). I make a point of trying all the other packages every once in a while, since you never know when something is going to be useful. I use the plot commands a lot as well.
Hello All: I am working on generating some correlated sequences using Matrix Exponential techniques. there seems to be some problem with the way maple manages memory (or am i doing something wrong?). specifically, in the code below, i am calling a few functions inside a for loop but none recursively. so as the for loop progresses my stack (memory; seen as PF Usage in win XP) size should not really blow up. right? but in Maple 9.0 and 10.0 this below program would give a "Execution stopped: stack limit reached." exception after about 30000 executions(I am running on a WinXP machine , about 2.8GHz, with 512 MB RAM, also checked on a machine with 1 GB Ram; and another 1GB in page file size). But the same program seems to work alright on the same machines with Maple8 running (i uninstalled maple-9 and installed maple-8 in one case). I could go up to 300,000 iterations without any problem. And the memory would go from about 250MB (PF Usage) to about 800MB. So even in Maple 8 there is some stuff that is being dumped on the stack; i tried to run Garbage collector (gc()) function once every 500 iterations; it did not make any difference either. Can anyone please look into it?
The University of Toronto is Canada's largest university and considered one of its very best. Its downtown campus (St. George) campus is the original site with all of the older buildings (circ. mid 19th century) and most of its most prestigeous faculties. Of note for the math crowd would be the Fields Institute .
I was doing some stuff with the quadratic nonlinearities that interest me. The quadratic nonlinearities involve structure having the form <>, where <> represents the usual dot product, A is a matrix, and v is a vector. I didn't want to use complex numbers with what I was doing, so I assumed things were real valued. I was surprised by what happened as a result. I have simplified the curious behavior so that it can be observed in a few lines. I can live with this, but it was a surprise.

This recommendation was provided by Dr. Jürgen Gerhard, a colleague of mine at Maplesoft and coauthor of the book Modern Computer Algebra. He felt that Göttingen was definitely a center for German mathematics and science and well worth the visit if you are mathematically inclined. The city is located virtually in the geographic center of the country (in the state of Lower Saxony...

I've never been to Ireland, but this was the first thing that popped into my head when I heard of "mathematical tourism":

As the story goes (recounted here among other places), on October 16, 1843, the Irish mathematician William Rowan Hamilton was walking along the Royal Canal in Dublin with his wife, when he invented the basic relation defining the quaternions. (He had previously been thinking about ways of extending the complex numbers to higher dimensions.) Supposedly, he was so excited by this that he carved i=j=k=ijk=-1 into nearby Brougham Bridge, which must have been one of the most spectacularly opaque pieces of graffiti in history. Unfortunately, there is no trace of such a carving now, but there is a plaque commemorating Hamilton's idea.

William Rowan Hamilton Plaque - geograph.org.uk - 347941

Licence: JP [CC-BY-SA-2.0 (http://creativecommons.org/licenses/by-sa/2.0)], via Wikimedia Commons

According to the article, since 1989 mathematicians from the National University of Ireland, Maynooth have organized a pilgrimage from Dunsink Observatory to the bridge on the anniversary of Hamilton's discovery. So if you're ever in Dublin in October, you assuredly have someplace to go.

(But be sure not to commute there! :))

Hi. My name is Yu-Hong Wang and I work in the Graphical User Interface (GUI) group at Maplesoft. I'd like to generate some chatter about GUI's role in Maple 10. First some background about myself: I'm a CS grad who's been with the company in some form or another for nigh five years now.

I'm mainly a Mac guy. My affair with the fairer platform began thirteen years ago, and I've been developing on the Mac for close to ten years. I can still remember the days of Codewarrior, MPW, and Macsbug. Anyone care to A9F4? So by now, I hope that I've convinced you that I'm very much a fan of the Mac user experience.

Attached (sim.mpl) is a simple game simulation with data from last years World Series champion Red Sox. Bump up infolevel to see what's going on during a game (as shown below). In the "Maple Baseball" post I wanted to see if the number of runs our team was scoring was appropriate. Obviously, the rule of thumb, 3-hits = 1 run is poor at best. What I really want to find out is if there is a way to improve our scoring chances. The standard baseball batting-order uses the following heuristic:

  • lead off with someone with a high on-base percentage (and who can maybe steal a base)
  • next 2 are good contact hitters
  • batter 4 is your "clean-up" hitter; someone with power
  • etc.
Thanks for the considered words from Tom, Jim and Trogdor The Burninator, the origins of the name lost in the mists of time?! Tom mentioned several points that I'd like to comment on. The use of extra study books, written at a lower level, is a strategy that I see some local students use. Interstingly though its the more successful student who is using them. The student whom I encounter usually doesn't do this. They have the official text and maybe some printed lecture notes from the internet and thats it. I suspect in this case the problem isn't just the math but the concept of how to study math that is the problem.
I suppose I'll jump in to the world of the blog with a question: What do you consider to be a solid and accessible introductory textbook to calculus? By Solid I mean: No gaps in coverage that leave the reader at a disadvantage because of unclear text and examples or outright missed topics. By Accessible I mean: Written so the average student can expect to understand the concepts directly or with a small amount of help outside the classroom.
Early this season, after the Maplesoft team came out on the wrong side of a 13-6 loss, we were frustrated by the team's inability to score more runs. The previous year we averaged 14 runs a game. This started me wondering, just how many runs can our team expect with a given lineup? Suppose you assume that it takes three hits in an inning to start scoring runs. Now, let's assume you have five .500 hitters coming up to bat. What is the probability that you'll get 3 hits among those five batters, thus scoring one run?

Here are two illustrations for how one might want to check to see if g is the same as f. The attached file is a Maple 10 worksheet.

This post is primarily a test of attaching pictures and documents within the environment. If this works, you should see a photo of the view from our rental apartment during my family's recent holiday in Tuscany, and you should be able to access a Maple document via the attachment. Any problems in viewing or detaching, contact me. Any questions on the apartment, see www.toscanacasevacanza.com.
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