Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effective Field Theory and the Fermi Surface   This is an introduction to the method of effective field theory. As an
application, I derive the effective field theory of low energy excitations in a
conductor, the Landau theory of Fermi liquids, and explain why the high-$T_c$
superconductors must be described by a different effective field theory.

26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat