Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The limit $m_q \to 0$ of perturbative QCD   This treatment of power corrections (in a special case of Euclidean
asymptotic regimes and vacuum condensates) remains exemplary. Unlike
A.Mueller's 1985 "renormalon" paper, this trail-blazing Letter:
  1) was based on the correct mechanism of factorization for power corrections
(--> comments appended to the main text);
  2) used a method (which subsequently became Asymptotic Operation;
hep-ph/9703424 and refs. therein) that automatically yields exact diagrammatic
formulas for the coefficients of power corrections, which directly allow
non-perturbative operator interpretation (without any 'matchings');
  3) did not conjure irrelevant mathematical concepts (Borel summation) nor
introduce arbitrary hypotheses ("renormalons") to explain what is clear already
from careful analysis of diagrams (coefficients of power corrections are not
perturbatively calculable).
  Incidentally, January 4 is the birthday of Sir Isaac Newton whose example as
regards non-invention of arbitrary hypotheses proves so hard for theorists to
follow.

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The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
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The categories of this paper are: alg-geom