Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some Answered and Unanswered Questions About the Structure of the Set of
  Fermionic Actions with GWL Symmetry   Several issues related to the question "How simple can Ginsparg-Wilson
fermionic actions be?" are discussed, and it is suggested that simplicity in
the eigenspace should be looked for.

22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
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
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc