Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nuclear interactions and the space-like structure of the pion   Three instances are discussed in which results produced by chiral
perturbation theory can be reliably pushed to high space-like values of
transferred momenta: 1. nuclear interactions, 2. nucleon sigma-term and 3.
space-like structure of the pion

4
The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-th
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
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The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: stat