Good teachers do try to use consistent notation, but they also understand the need to communicate with the rest of the world and so end up having to teach histo

Good teachers do try to use consistent notation, but they also understand the need to communicate with the rest of the world and so end up having to teach historical accidents. Here's a fun one: pi is wrong! http://www.math.utah.edu/~palais/pi.pdf http://www.math.utah.edu/~palais/pi.pdf