
Multiplied by a MATRIX
of negative I comma zero...
The Big Bang Theory Season 5, Episode 7

You know how I know
we're not in the Matrix?
The Big Bang Theory Season 2, Episode 2

I haven't seen him this stuck since he
tried to figure out the third Matrix movie.
The Big Bang Theory Season 3, Episode 14

I'm in the MATRIX, Leonard;
I see everything.
The Big Bang Theory Season 5, Episode 10

the calculation
of nuclear MATRIX elements.
The Big Bang Theory Season 7, Episode 20