Hi, I'm new around here and this is my stupid joke. It might be old to you but sorry because I'm Vietnamesse.
Q: Why didn't the man die because of drinking poison?
A: Because he drank it in the living-room!:P
Good joke; thanks!
Character is who you are when no one is looking.
Welcome to the forum.
In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.