So there is no universal order of operations in RPN? That's disappointing, but I suppose one could define their own system. It is safe to say that any operation in RPN can be represented as a stack of it's arguments followed by the symbol itself though, isn't it?
Interesting. I never thought about using multiple arguments, but it does make a great deal of sense. I actually have no system in mind, I was just curious.
Recently I was doing various equations in RPN to teach myself the notation. Everything went fine until I wanted to do a limit. How would one go about expressing limits (and any other operation that isn't addition, subtraction, division, or multiplication) in RPN?