Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spinor two-point functions and Peierls bracket in de Sitter space   This paper studies spinor two-point functions for spin-1/2 and spin-3/2
fields in maximally symmetric spaces such as de Sitter spacetime, by using
intrinsic geometric objects. The Feynman, positive- and negative-frequency
Green functions are then obtained for these cases, from which we eventually
display the supercommutator and the Peierls bracket under such a setting in
two-component-spinor language.

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The categories of this paper are: acc-phys
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The categories of this paper are: patt-sol
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The categories of this paper are: alg-geom
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: econ
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The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg