Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unfaithful embedding of causal sets   In the causal set approach, spacetime is a continuous approximation of a
faithful embedded causal set. But the faithful embedded causal set describes
the empty spacetime and cannot describe matter. Only faithful embedding of
coarse grained causal set is necessary for the emergence of spacetime. The
initial causal set can be unfaithfully embedded. The following properties of
the universe can be the consequences of the unfaithful embedding:
antiparticles, fields of interactions, the inhomogeneous distribution of the
matter.

15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin