Noether's 2nd variational theorem gives a correspondence between symmetries of a Lagrangian and Noether identities = relations among the E-L equations. How about relations among r …

Background I'm working to simplify the Lagrangian formalism of classical field theory for the situation of a vector bundle with a bundle metric and a metric connection. Particular …

Has anything been written on the following: Noether's 1st variational theorem establishes a correspondence betwween symmetries and invariants. If we deform the symmetries, the inva …