Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Proceedings of the Second International Workshop on Automated Reasoning:
  Challenges, Applications, Directions, Exemplary Achievements   These are the post-proceedings of the second ARCADE workshop, which took
place on the 26th August 2019 in Natal, Brazil, colocated with CADE-27. ARCADE
stands for Automated Reasoning: Challenges, Applications, Directions, Exemplary
achievements. The goal of this workshop was to bring together key people from
various sub-communities of automated reasoning--such as SAT/SMT, resolution,
tableaux, theory-specific calculi (e.g. for description logic, arithmetic, set
theory), interactive theorem proving---to discuss the present, past, and future
of the field.

30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom