Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Covariant Spin Structure   Every Dirac spin structure on a world manifold is associated with a certain
gravitational field, and is not preserved under general covariant
transformations. We construct a composite spinor bundle such that any Dirac
spin structure is its subbundle, and this bundle admits general covariant
transformations.

37
The categories of this paper are: supr-con
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
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The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: math-ph
9
The categories of this paper are: nlin
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The categories of this paper are: adap-org
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: patt-sol