Anybody who doesn't read that first chapter to the end is going to be very confused.
> To make it easier to read we use E^2(1-x) for (E(1-x))^2 and E(1-x)^2 for E((1-x)^2).
Why change that notation? That seems to purposefully be introducing confusion.
On page 14 they don't use that notation (om^2(x+y) = om^2(x) + om^2(y) -- according to their notation note that should really be om^2(x+y) = (om (x+y))^2).
Not trying to knock what seems like a really neat introduction, I just don't understand the need for defining ridiculously unconventional notation and then not using it consistently introducing a lot of confusion.