"Well, you know the old formula: Comedy equals tragedy plus time. And you have been asleep for a while. So I guess it's actually pretty funny when you do the math." - GLaDOS
Hello and welcome! This is my personal homepage I use for math teaching and research; I mantain other non-academical projects here. I'm always glad to hear from you on any subject; just write an e-mail to: deleo [AT] mail [DOT] dm [DOT] unipi [DOT] it.