Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The random lattice as a regularization scheme   A semi-analytic method to compute the first coefficients of the
renormalization group functions on a random lattice is introduced. It is used
to show that the two-dimensional $O(N)$ non-linear $\sigma$-model regularized
on a random lattice has the correct continuum limit. A degree $\kappa$ of
``randomness'' in the lattice is introduced and an estimate of the ratio
$\Lambda_{random}/\Lambda_{regular}$ for two rather opposite values of $\kappa$
in the $\sigma$-model is also given. This ratio turns out to depend on
$\kappa$.

18
The categories of this paper are: econ
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th