Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Why there is something rather than nothing: The finite, infinite and
  eternal   Many believe that the deep question of "why is there something rather than
nothing?" is unanswerable. The universe just is and no further explanation for
its existence is possible. In this paper I explain why this question must have
an answer, and why that answer must establish that physical existence is
inescapable and necessary. Based on the conclusion that if the universe is
eternal rather than having a beginning some finite time in the past, the
universe has to exist rather than not because its possible non-existence is
never an option, such an explanation is put forward. As a logical extension of
only an eternal universe being capable of providing an answer to the question
of why there is something rather than nothing, the argument necessitates that
the universe must be eternal. The consequences of this conclusion for cosmology
are then briefly discussed.

9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom