Fascinating! I'm sort of a math geek in my spare time, and this subject really interests me. It's not one that I know much about, so I should do some digging. The notion that dividing by zero is "undefined" is something I take for granted, so it's really interesting that the operation could have meaning sometimes.

My mind was similarly blown when a mathematician friend walked me through some of the mathematics of infinities and demonstrated really counterintuitive operations in that field.