Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Proceedings of the 9th International Workshop on Physics and Computation   The 9th International Workshop on Physics and Computation (PC 2018) was held
as a satellite workshop of the 17th International Conference on Unconventional
Computation and Natural Computation (UCNC 2018) in Fontainebleau, France, which
was held from 25-29 June 2018. PC 2018 was an interdisciplinary meeting which
brought together researchers from various domains with interests in physics and
computation. Research and important issues relating to the interface between
physics and the theories of computation, computability and information,
including their application to physical systems, were presented and discussed.

20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
26
The categories of this paper are: bayes-an
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg