[gajomi]

> it sounds like they've increased the accuracy of a neural network model of a system, notably for edge cases, by training it on complete a complete model of said system.

Not quite. It's really just that they require the dynamics to be Hamiltonian, which would be highly atypical of the kind of dynamics an otherwise unconstrained neural network would learn. This is reflected in their loss function, the first of which learn an arbitrary second order differential equation, the second of which enforces Hamiltonian dynamics.

I don't understand how this was considered novel enough to warrant at PRE paper.

Here is a link to the paper:

https://journals.aps.org/pre/pdf/10.1103/PhysRevE.101.062207