Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the high derivative fermionic operator and trace anomaly   We construct a new example of the high derivative four-dimensional conformal
operator. This operator acts on fermions, and its contribution to the trace
anomaly has opposite sign, as compared to conventional scalars, spinors and
vectors. Possible generalizations and applications are discussed.

15
The categories of this paper are: nucl-ex
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat