Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On formal scattering theory for differential Faddeev equations   The formal scattering theory is developed for the three-particle differential
Faddeev equations. The theory is realised along the same line as in the
standard two-body case. The solution of the scattering problem is expressed in
terms of the matrix T-operator constructed from the matrix resolvent of the
differential Faddeev equations. The relationships of the matrix T-operator with
elements of transition operators and Faddeev T-matrix components have been
established.

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The categories of this paper are: acc-phys
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The categories of this paper are: nlin
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The categories of this paper are: econ
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The categories of this paper are: stat
32
The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: cs
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio