Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Wick Rotation, Regularization of Propagators by a Complex Metric and
  Multidimensional Cosmology   The Wick rotation in quantum field theory is considered in terms of
analytical continuation in the signature matrix parameter w = eta_00.
Regularization of propagators by a complex metric parameter in most cases
preserves (i) the convergence of Feynmann integrals (understood as Lebesgue
integrals) if the corresponding integrals of Euclidean theory are convergent;
(ii) the regularity of propagators in the coordinate representation if there is
regularity in the Euclidean case. The well-known covariant regularization by a
complex mass does not in general satisfy these conditions. Theories with a
large family of propagators regularized by complex metric were previously
considered by the author, and analogues of the
Bogoliubov-Parasiuk-Hepp-Zimmermann theorems were proved. [V.D.Ivashchuk, Izv.
Akad. Nauk Mold. SSR, Ser. Fiz.-Tekhn. i Math. Nauk, 3 (1987), 8; 1 (1988),
10]. This paper shows that in the case of multidimensional cosmology describing
the evolution of n spaces M_i, i = 1, ..., n, the Wick rotation in the
minisuperspace may be performed by analytical continuation in the dimensions
N_i = dim M_i or in the dimension of the time submanifold M_0.

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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
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The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
1
The categories of this paper are: cs
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-ex