Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Poor man's scaling: $XYZ$ Coqblin--Schrieffer model revisited   We derive the third-order poor man's scaling equation for a generic
Hamiltonian describing a quantum impurity embedded into an itinerant electron
gas. We show that the $XYZ$ Coqblin--Schrieffer model introduced by one of us
earlier is algebraically renormalizable in the sense that the form of the
Hamiltonian is preserved along the scaling trajectory, write down the scaling
equations for the model, and analyze the renormalization group flows in the
cases of both constant and pseudogap densities of states.

21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs