Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On a development of the phenomenological renormalization group   We propose a modification of the Nightingale renormalization group for
lattice spin and gauge models by combining it with the cluster decimation
approximation. Essential ingredients of our approach are: 1) exact calculation
of the partition and correlation function on a finite lattice strip; 2)
preservation of the mass gap or the second moment correlation length, computed
in the infinite strip length limit, on each decimation step. The method is
applied for studying general two and three dimensional Z(N) models. A perfect
agreement with exact results (whenever available) is found. An extension of the
method to models with a continuous symmetry is briefly discussed.

24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat