Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: ERG and Schwinger-Dyson Equations - Comparison in formulations and
  applications --   The advantageous points of ERG in applications to non-perturbative analyses
of quantum field theories are discussed in comparison with the Schwinger-Dyson
equations. First we consider the relation between these two formulations
specially by examining the large N field theories. In the second part we study
the phase structure of dynamical symmetry breaking in three dimensional QED as
a typical example of the practical applications.

8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph