Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Progress in Lattice QCD   After reviewing some of the mathematical foundations and numerical
difficulties facing lattice QCD, I review the status of several calculations
relevant to experimental high-energy physics. The topics considered are moments
of structure functions, which may prove relevant to search for new phenomena at
the LHC, and several aspects of flavor physics, which are relevant to
understanding CP and flavor violation.

9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ