Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Operator product expansion coefficient functions in terms of composite
  operators only. Nonsinglet case   A new method for calculating the coefficient functions of the operator
product expansion is proposed which does not depend explicitly on elementary
fields. Coefficient functions are defined entirely in terms of composite
operators. The method is illustrated in the case of QCD nonsinglet operators.

2
The categories of this paper are: math
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph