Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison of Variations of Statistical and Wald's Entropies   We write the variation of the statistical entropy of matter fields outside a
black hole along a Killing vector. This is done for generalized theories of
gravity, using a Lie derivative and identification of the energy momentum
tensor.

36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys