Quote:
Originally Posted by paul99
Hi,
Playing a bit of catchup  just finished watching both lectures and starting the homework.
I must have missed something in the lectures or my math is more rusty than I realized, but what does the notation X = [1, 1] x [1, 1] mean??
Thanks!
Paul

It is the the square on the 2dimensinal plane from
to
on both coordinates, i.e., all points
such that
and
.