Comment by skhunted

[edit] I've finally blown it. You're a moron. Your definition of "function" as some subset of AxB is how it's defined in foundations. It's not how it's defined in analysis. In analysis, your definition would describe the term "mapping". What a crackpot and idiot. I'm done wasting time and sanity on this.

Interesting. So you think there are functions in real analysis that are studied that don't meet the definition I gave? Is there a functional that does not meet the definition I gave?

In all contexts a function is a subset of the product of two sets that meets a certain condition. Anything that does not meet this definition is not called a function.

Every functional meets the definition of function.