Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Density functionals derived from Feynman diagrams   We construct a stationary density functional for the partition function from
a chosen set of one (boson) line irreducible Feynman diagrams. The construction
does not proceed by the inversion of a Legendre transform. It is formulated for
fermions with Coulomb interactions, in which case a stationary functional of
the particle density is contructed, as well as for nucleons interacting with
mesons, which involves a stationary functional of several densities. The use of
Kohn-Sham orbits is shown to be an unnecessary complication.

16
The categories of this paper are: stat
1
The categories of this paper are: cs
3
The categories of this paper are: physics
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph