Personal Stories

Stories about how you have used Maple, MapleSim and Math in your life or work.
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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