Understanding " f:S --> R" Hi all, I am kind of confused as to what it means to do this operation: f:S --> R Let's say S is a set in R^2, and function f takes its values into R^3. I see this a lot but don't really understand it. Does that mean that f is a function of two variables (call x,y) and its output is a function of (x,y,z)? Not to mention when I see a function mapping to R^n. :| Could anyone give me a few examples maybe to help me understand? Sorry if this is confusing--as you can see I am confused! Any help would be greatly appreciated, thank you!