Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lagrangian analysis of `trivial' symmetries in models of gravity   We study the differences between Poincare and canonical hamiltonian
symmetries in models of gravity through the corresponding Noether identities
and show that they are equivalent modulo trivial gauge symmetries.

4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs