 Quote by Dick
I think you are right. It should be u_yy, the second derivative. Not (u_y)^2. It's a linear operator. Is it a typo?
|
But if that is the case, why don't they write ∂
yy (instead of (∂
y)
2? (I am not sure whether it's a typo, but it seems to me that the context of it highly suggests it isn't)
Also, if they really meant (u
y)
2, how could it be expressed as an "operator"?
Thanks!