Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CORE 2.1 (COmpendium of RElations, Version 2.1)   The present CORE 2.1 (COmpendium of RElations, Version 2.1) contains various
formulas and relations used in the practical calculations in the Standard
Model. The properties of the Pauli, Dirac, Gell--Mann matrices, wave functions
of free fermions and gauge bosons are considered. We present the full
Lagrangian of the Standard Model and the corresponding Feynman rules. The
method of the evaluation of the Feynman (loop) integrals and calculations in
non-covariant gauges is considered. We discuss in brief the relativistic
kinematic and present a large number of the matrix elements of the various
processes in the Standard Model.

7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
15
The categories of this paper are: nucl-ex