Introduction to Geometric Algebra (part two). This article continues to introduce the reader to the basics of geometric algebra. Some problems will be provided for the reader to work on their own in order to reinforce the lessons described here. While a few of the solutions to these problems will be provided, readers are encouraged to solve them all and post their answers as comments. [...] If the reader works to comprehend the content and also works the problems, they will come away with a basic understanding of what a geometric algebra is and how they work. Specific goals include the following. The reader will know how to perform basic operations like reflection, rotation, and reversion. The reader will begin to work with objects expressed in a representation-free manner. [kuro5hin.org]
Here's part one. Many readers are expressing intense interest in this material. They're interacting with one another. Can you believe it? they're spontaneously doing math, and enjoying themselves!
A lesson in marketing needed. It looks like many companies need marketing lessons. Here's a "marketing" description of a game:
Interstellar Flames is an intense action game featuring a groundbreaking 3d engine for the Pocket PC. Product Features
Blindingly fast 3D graphics and gameplay
Fully perspective corrected texture mapping.
Mipmapping.
Particle engine.
Transparent smoke effect.
Shadow effect.
Do they really think that people care about their 3D engine? Do they think that people even know what a mipmapping or particle engine is? This thing has clearly been written by a programmer who's so proud about his technical achievements that he fails to see that people don't care about them. Bad marketing. [Krzysztof Kowalczyk's Weblog] What do you think? [] links to this post 7:56:20 AM
The Darthmouth (04/2000): "Sites such as Versity.com hire college students to take notes in their classes and post them on the web"
Some professors are angry because they "feel that their classroom materials are being plagiarized"...
It seems this wasn't a sustainable business model, as all the sites mentioned in the article seem to have disappeared. But I'm thinking, if only there were sufficient cohesion and trust among classmates, they could use the same method, greatly dividing the work of taking notes, and everyone would benefit (even people who aren't enrolled in the course).
