Recent content by zenctheo

Ok. It's nice to learn a new thing. Even if I am proven wrong :)) Thanks a lot.

Thanks a lot for the reply. You that I am wrong because I was the one saying that the functions should also have the same formula. In order to get things straight: You mean that the above two functions are equal... or not?

Hello to every one! I have a question that came up when I was talking with a fellow mathematician. I used to say that two functions are equal when the have the same formula and the same domain and codomain. We read in a book though that two functions are equal when they have the same domain...