Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Introduction to B Physics   These lectures provide an introduction to various topics in heavy-flavor
physics. We review the theory and phenomenology of heavy-quark symmetry,
exclusive weak decays of $B$ mesons, inclusive decay rates, and some rare $B$
decays.

29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol