Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The effective description of non-strange hadrons low-energy electro-weak
  transitions   Starting with the general principles of global and local symmetries, the
effective pion-nucleon lagrangian, essentially non-linear in pion field, to
describe the non-strange hadrons low-energy electro-weak transitions is
developed. We encounter no divergence summarizing properly all the infinite
power series in pion field which occur in the course of treatment. Our
consistent approach proves to be relevant in considering P-parity violation in
pion-nucleon interactions.

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The categories of this paper are: supr-con
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th