Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On deformations of metrics and their associated spinor structures   Smooth deformations of a Minkowski type metric in a four-dimensional
space-time manifold are considered. Deformations of the basic spin-tensorial
fields associated with this metric are calculated and their application to
calculating the energy-momentum tensor of a massive spin 1/2 particle is shown.

34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th