Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generally Covariant vs. Gauge Structure for Conformal Field Theories   We introduce the natural lift of spacetime diffeomorphisms for conformal
gravity and discuss the physical equivalence between the natural and gauge
natural structure of the theory. Accordingly, we argue that conformal
transformations must be introduced as gauge transformations (affecting fields
but not spacetime point) and then discuss special structures implied by the
splitting of the conformal group.

13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int