Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Statistical Mechanics: A Selective Review of Two Central Issues   I give a highly selective overview of the way statistical mechanics explains
the microscopic origins of the time asymmetric evolution of macroscopic systems
towards equilibrium and of first order phase transitions in equilibrium. These
phenomena are emergent collective properties not discernible in the behavior of
individual atoms. They are given precise and elegant mathematical formulations
when the ratio between macroscopic and microscopic scales becomes very large.

0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol