Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: EF equivalent not isomorphic models   We construct non-isomorphic models M, N, e.g. of cardinality aleph_1 such
that in the Ehrenfeucht-Fraisse game of length zeta < omega_1 the isomorphism
player wins

20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
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The categories of this paper are: stat
29
The categories of this paper are: funct-an