- #1

mt91

- 15

- 0

I think I've got the DDI's:

So DDI 1 = -pi^2

DDI 2 = 6pi^2

DDI 3= 7pi^2

DDI4 = 49^4

Which I believe satisfies the DDI conditions, however I'm not sure what it means by calculate the range of unstable wavenumbers, anyone able to help out?