I am reading a book by one John Conway, and at one point he seems to imply that (where is the indicator function).
I can't quite understand this. I feel it should just be ...
So, does anyone know why?
Thanks in advance!
I am reading a book by one John Conway, and at one point he seems to imply that (where is the indicator function).
I can't quite understand this. I feel it should just be ...
So, does anyone know why?
Thanks in advance!