Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Noether Currents and Maxwell-type Equations of Motion in Higher
  Derivative Gravity Theories   In general coordinate invariant gravity theories whose Lagrangians contain
arbitrarily high order derivative fields, the Noether currents for the global
translation and for the Nakanishi's IOSp(8|8) choral symmetry containing the
BRS symmetry as its member, are constructed. We generally show that for each of
those Noether currents a suitable linear combination of equations of motion can
be brought into the form of Maxwell-type field equation possessing the Noether
current as its source term.

30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat