Are we ready?
Okay, ready for me to start.
Ready for the taping to start in a minute.
He's going to raise his hand and signal when I'm on.
Just a minute, though, let them settle.
0 Okay, guys.
Okay, give me the signal, then, when you want me to start.
Okay, this is linear algebra, lecture four.
And, the first thing I have to do is something that was on the list for last time, but here it is now.
What's the inverse of a product?
