Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An inversion theorem in Fermi surface theory   We prove a perturbative inversion theorem for the map between the interacting
and the noninteracting Fermi surface for a class of many fermion systems with
strictly convex Fermi surfaces and short-range interactions between the
fermions. This theorem gives a physical meaning to the counterterm function K
that we use in the renormalization of these models: K can be identified as that
part of the self--energy that causes the deformation of the Fermi surface when
the interaction is turned on.

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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ph
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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: eess
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The categories of this paper are: adap-org
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn