Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The general cancellation of ladder graphs at finite temperature   In some cases, an important example being at finite temperature, extreme
infrared, collinear, or light-cone behaviour may cause the usual loop expansion
to break down. For some of these cases higher order ladder graphs can become
important. In an earlier paper it was shown that, given a particular relation
between a vertex and a self-energy function, the resummation of the ladder
graphs simplifies significantly when other types of graphs are included in a
consistent effective expansion. In this paper we show that this assumed
relation is valid for a large class of vertex and self-energy functions at
finite temperature.

17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
1
The categories of this paper are: cs
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat