4.2 Polynomial differential operators

We discuss polynomial differential operators and ways to use them to solve systems of differential equations

[tenebrae]

It's probably too late, but there's an error at 1:19 :: in the second equation it should be y' *-* y, not plus, and it influences the end result

[yourmamaiscrazy]

did not learn that much from this man, but ceep it up

[sergioh]

The like ratio here seems unjustified to me. Imo, you did a good job.