Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Second Law and Cosmology   I use cosmology examples to illustrate that the second law of thermodynamics
is not old and tired, but alive and kicking, continuing to stimulate
interesting research on really big puzzles. The question "Why is the entropy so
low?" (despite the second law) suggests that our observable universe is merely
a small and rather uniform patch in a vastly larger space stretched out by
cosmological inflation. The question "Why is the entropy so high" (compared to
the complexity required to describe many candidate "theories of everything")
independently suggests that physical reality is much larger than the part we
can observe.

32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math