Emily, the product of the determinants is the determinant of the matrix product.

eta: Perkins -- I watched it, and I think the key bits where that their father is a ghost catcher/demon hunter, and he's disappeared -- they're tracking him. DeanNotDean's girlfriend died/disappeared/appeared flaming on the ceiling the same way their mother had 20 years ago (which might have been what set their father off). There might be a journal or something they're using to follow his steps.

Last week's supernatural: they started 22 years ago when Not!Dean (Sam) was a baby. His mom gets up to check on him, sees a shadowy figure at the crib, thinks it's her dh, then hears the tv on downstairs. Walks downstairs, sees her dh sleeping on the sofa in front of the tv, runs back upstairs, screams. DH comes running, baby is okay, then sees blood drip on baby's face, looks up, wife is impaled to the ceiling and then bursts into flames. The husband and the two sons are saved. . . move on to 22 years later. Sam is hoping to get a scholarship to law school (as if) and is living with his gf when his older brother Dean shows up. Daddy was following up on a "White Woman" -- which is a type of ghost and has disappeared. Dean convices Sam to go out to check on Dad. They find the WW and why the WW was there and solve the haunting there. . . they don't find their father but they do get coordinates as to where he went. Sam returns home to discover his gf impaled on the ceiling -- she then bursts into flames. So Sam joins Dean to go look for Dad at the next place, i.e., where they were this week.

It amazes me that somehow, despite 22 years of hunting they still don't know what the thing was that killed their mother. Obviously, they need a Giles or a Wesley.

Emily, the product of the determinants is the determinant of the matrix product.

You sure? Bless you, cause that's exactly what I need to know. Why do neither of Mathworld's entries (on matrix multiplication and on determinants) tell me this?

Dude! That's Callum Keith Rennie!

Yeah, I'm hundreds of posts behind in Boxed Set. I'm sure it came up.

eta:

Emily, MIT thinks so.

It did.

And wasn't that a waste of a good actor?

And wasn't that a waste of a good actor?

Did you see Bliss? He was wasted IN SOFT CORE PORN. My waste bar has been set high. He's looking ... weathered.

Thanks, sumi!

Oh yeah. Just proved it to myself for 2x2s, guess it would make sense. Anyway, thank you!

Is Supernatural being discussed in Boxed Set?

Is Supernatural being discussed in Boxed Set?

Even if it's not now, it fits within the charter -- it might be easier to drum up conversation.