It is neat- the need to look at the second derivative in "Optimal Brain Damage" (because we know the first derivatives will be zero due to the use of optimizati

It is neat- the need to look at the second derivative in "Optimal Brain Damage" (because we know the first derivatives will be zero due to the use of optimization) also underlies Fisher information https://en.wikipedia.org/wiki/Fisher_information https://en.wikipedia.org/wiki/Fisher_information .