Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Causal Fermion Systems: An Elementary Introduction to Physical Ideas and
  Mathematical Concepts   We give an elementary introduction to the theory of causal fermion systems,
with a focus on the underlying physical ideas and the conceptual and
mathematical foundations.

15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat