Many traditions hold that Moses wrote the first five books of the Bible. If we assume this is true, then there is one thing I think is clear about Moses, based on the things he wrote: he loved numbers. I’m pretty sure he was a mathematician at heart, or at the very least an accountant, […]

What is a vector?

When students first meet vectors they are pretty much told that vectors are arrows. They move arrange the arrows head-to-tail to add them, and they lengthen the arrows when they multiply them by numbers. Sometimes the vector is represented using coordinates, but they are told that this is shorthand for the arrow […]