Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Landau-Khalatnikov-Fradkin transformation of the fermion propagator in
  massless reduced QED   We study the gauge-covariance of the massless fermion propagator in reduced
Quantum Electrodynamics (QED). Starting from its value in some gauge, we
evaluate an all order expression for it in another gauge by means of the
Landau-Khalatnikov-Fradkin transformation. We find that the weak coupling
expansions thus derived are in perfect agreement with the exact calculations.
We also prove that the fermion anomalous dimension of reduced QED is gauge
invariant to all orders of perturbation theory except for the first one.

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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
32
The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: math-ph
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The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg
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The categories of this paper are: eess