Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constructing strongly equivalent nonisomorphic models for unsuperstable
  theories, Part A   We study how equivalent nonisomorphic models an unsuperstable theory can
have. We measure the equivalence by Ehrenfeucht-Fraisse games.

4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph