Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Physical fields and Clifford algebras   The physical fields (electromagnetic and electron fields) considered in the
framework of Clifford algebras $\C_2$ and $\C_4$. The electron field described
by the algebra $\C_4$ which in spinor representation is realized by well-known
Dirac $\gamma$-matrices, and by force of isomorphism $\C_{4}\cong\C_{2}\otimes
\C_{2}$ is represented as a tensor product of two photon fields. By means of
this introduced a system of electron field equations, which in particular cases
is coincide with Dirac's and Maxwell's equations.

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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: eess
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: math
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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: gr-qc
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The categories of this paper are: physics
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The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th