My first real visceral realization of the non-commutative nature of driving a car was the first time I tried to parallel park and attempted to pull front end first into the space.
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It's a good day for people posting about science I don't understand...
Peter Woit points to the Non-Commutative Geometry blog, at which Alain Connes, the godfather of non-commutative geometry, is posting. It's not the most polished blog, but if you can understand what they're talking about, it's…
Hoisted from the comments, Robin asks:So, with that in mind, here's a question. What do you think about teaching quantum mechanics as noncommutative probability theory? In other words, by starting with probability theory and alluding to probabilistic mechanics (e.g., distributions on phase space),…
Quaternions
Last week, after I wrote about complex numbers, a bunch of folks wrote and said "Do quaternions next!" My basic reaction was "Huh?" I somehow managed to get by without ever being exposed to quaternions before. They're quite interesting things.
The basic idea behind quaterions is: we…
(With apologies to Georg Cantor)
Theorem: There are an infinite number of stupid ways to park.
Definition: We define as stupid any parking method that places any fender of a car outside the legal lines bounding the space.
Proof:Consider a line L through the center of a legal parking space, parallel…
I don't remember watching this video in High School Driver's Ed class....what a shame!
Note also that the last words in the video were, "...with a final position error of two feet." I guess that's close enough if you park in NYC and/or Boston.
The study is from Stanford, so they're using suburb sized parking spaces!
Nice, they managed to do it for real!
One of my memories from my teenage years is a friends 1964 Chevy Nova. If you got the car up to speed it would make a 90 degree turn with just a lockup of the brakes.
This one looks like its defending a food source. (it seems to stick its face into the meat a few times.) ground squirrels (I know this is a tree squirrel) often cannibalize their dead, sometimes with revolting conseqences